Sioa Sees Natit i He tet ie ¢ tebe iiesteras ot sores <> ees veh aeh Seesaseses> SEE Z S z roe os se Eatiaotee .. = < eS $ . : : =o : 7 : Saige: eee Seatacesisseqeeseeatess : BESTE ppessistey Se: Seiseut es seececeeeras 3g ae 3 So Sess eases 25% EISS rs : Ssese eeeeaseeeoneses at woes ered = et ere) > iceor : : seieeesiessrstpigseis ams ove. 2 goaecessenssaeesasecisests Spee iios Svea es seks sieetiseses: Seeeeeeee Retieeressees State . Leste <= = eytatatar, : = Tsai See SSS onseneaegeey as 3 = oS sores See RS ieee — x ees 2 s ae = : tateraes Eat : Senoeeoe ay SSS: = 5 = ‘3 a eS fe . = 2335 = = = Saae = 5 rs se S233 <2ce = a ci = = 2 5 = ; eseas = : : 5 : : me = z a = =: = : $=: : S335 estitieec = = a Li % 32 <3 = Stasi > aapete = : of Seesesesyeset eat Eephsrurs Sena Sees etstessaeststs tiesssietessretesee arate tieater S352 SS " SEES Seotates eee ieee SSS SES SSS SSS HARVARD UNIVERSITY. LIBRARY OF THE MUSEUM OF COMPARATIVE ZOGLOGY 13,9! Bought Unguel Ib, 1920. Se x it ig de et Bae lr riNs OF AMERICAN PALEON TOMOGY on, AW Novebmer, rorr — June, 1977 Harris Company Cornell University, Ithaca, N. Y. Wie Sea Ae ig ie ii ate N But. No. a CONDTENRSFOR VOL Ve 22.—New Eocene Fossils from the Southern Gulf States. By T. H. ALDRICH..... 23.—New and Interesting Fossils from the Devonian of New York. By AXEL OLSSON is. Serre Aeeeciece seca wesc ceite ss 24.—New and Interesting Neocene Fossils from the Atlantic Coast Plain. By (ASXGRSIe ss OSS ONG ecoer oe eree ee eee 25.—On a Restoration of the Base of the Cranium of Hesperornis Regalis. by RES Wee SEU eerarmente cm sentece: 26 —The Echinoidea of the Buda Limestone. IBF Vel, We WWASDESNIS 4 22825. ccconcos5 5000506 27._New Miocene Fossils. By AXEL OPSS ONG tas oases esto Soe ence aes 28.—The Murfreesboro Stage of our East Coast: MioCene? i. oscsscleetsecceseeu eens: 29.—Santo Domingo Type Sections and Fossils, Part I1.* By C. J. Maury... 30.—Santo Domingo Type Sections and Fossils, Part I1.* By C. J. Maury... Index to-Volume V_ .................. 0.000008. 27-65, 66-68, Page 1-24 121-152 153-164 165-415 416-460 463-478 *Bulletins 29 and 30 were published in two sections each : No. 29, Section 1 (through p. 284) published Mar. (through p. 470) published May Section I 31; Section 2) Apr. 29 No: 30, 29 ; Section 2, June 30, 1917. Vaybe\ Vol. 5 BULLETINS OF AMERICAN PALEONTOLOGY O No. 22 f NEW EOCENE FOSSILS FROM THE SOUTHERN GULF STATES BY T. H. ALDRICH November 15, Iomr Cornell Univ., Ithaca, N. Y. Wa Saat Harris Co. ; NEW EOCENE FOSSILS FROM THE SOUTHERN GULF STATES BING T. H. ALDRICH The species described in this paper are mostly from Alabama. They present some interesting forms, and new genera from our Eocene. Nearly all of them are rare. The types are in the cabinet of the writer. I am indebted to Miss. E. G. Mitchell of Washington, D. C. for the very striking and accurate fig- ures of nearly all the species. DESCRIPTION OF SPECIES Crassatellites (Crassinella) aldrichianus, Harris sp. Blate ee ngs) 12 This little shell differs’ somewhat from the typical form. It has a less crenulated basal margin ; the anterior dorsal mar- gin is more arcuate. Associated with it is another form (see fig. 3) which may take the name of C. clarkensis. It hasa more regular dorsal margin, is coarsely sculptured, and has no denticulation on the inner ventral margin. I am inclined to leave it as a variety however. Woods Bluff, Ala. Also 6 miles east of Thomasville, Ala., same horizon. : ‘ Cardium ( Trachycardium) clatbornensts. n. sp. Plate I, fig. 4 Shell large, covered with numerous ribs which are square in section and ornamented with close-set, triangular imbrica- tions, all ribs being covered except in the umbonal region. The sunken spaces between the ribs are not half their width 4 BULLETIN 22 4 and in the umbonal region show a series of riblets at right angles following the growth lines. Inner basal margin dentic- ulated. ‘The substance of the shell is thin, showing the ribs in the cavity. The hinge was unfortunately broken. Height 35 ; breadth 33 mm. De Soto, Miss. Claibornian. . Tellina (Angelus) prolenta, n. sp. Plate vis sea 5 Shell small, rather compressed, inequilateral, posterior longest, the dorsal margin descending sharply on the anterior end, shell rather pointed, while the posterior is rounded ; hinge normal ; exterior smooth, with a few faint lines of growth ; a strong depressed area anteriorly running from beak to base. Internally a slight rise drops from the beak to the ventral margin ; muscular scars just perceptible. Length 5 ; height 2 mm. Claiborne Sand bed, Claiborne, Ala. The anterior depression is the most noteworthy and dis- tinctive peculiarity. Tellina temperata, n. sp. Plate I, fig. 6 Shell small, oval, moderately convex, inequilateral, reg- ularly rounded, beaks very small, surface polished and mark- ed with concentric lines separating rather broad interspaces. Hinge normal ; right laterals rather strong. Muscular scars distinct but shallow ; pallial sinus partially confluent. Length 11; height 6 mm. Gregg’s Landing, Alabama River, Ala. This species resembles 7. subtriangularis, nob., somewhat but is more regularly rounded, lacks the posterior fold and the raised lines thereon. 5. ALDRICH, EocrNE Fossirs 5 Ervilia meyeri, 0. sp. Blatewi nes, 7: Shell small, nearly equilateral, surface covered with num- erous close-set raised lines becoming somewhat coarser near the ventral edge. Beak low but pointed. Interior polished. Posterior muscular scar well defined, the anterior very faint. Cardinals rather strong ; laterals doubled in the left valve. Length 4; height 2.5 mm. Claiborne Sand bed, Tombigbee River, Ala. Named in honor of Dr. Otto Meyer, one our early work- ers in the Eocene. Akera texana, n. sp. Plate II, fig. 1 Shell medium, substance extremely thin, surface smooth except some wrinkles where the body whorl meets the sunk- en spiral area. Strongly depressed ; whorls about five, very sharply defined at the apical end with a slightly reflected edge. Umbilical part bordered by a reflected edge. Length 13; breadth ro mm. Lower Claiborne Eocene of Smithville, Tex. This is a new genus to our Eocene and rare no doubt on - account of its very fragile shell. Several examples were obtain- ed but all went to pieces on drying. Scobinella newtonensis, n. sp. Plate 1 fig Shell rather solid, medium size; whorls nine or ten ; apex slightly bent, embryonic whorls four in number in per- fect specimens ; a raised line starting just below the suture on the next whorl, which becomes more prominent on the latter whorls, or roughly tuberculated ; the median part of 6 BULLETIN 22 6 the whorl starting with a .row of spiral and strongly mark- -ed tubercles which gradually double and are somewhat in- clined to the vertical axis ; just above this double series an- other appears with tubercles twice as long spirally as high; the fascicular surface very concave, marked by three or four broad but dim spiral lines ; fasciole nearly semicircular ; body whorl ornamented with numerous coarse tubercles set in spi- rals also inclined to the axis ; outer lip striated within ; col- umella nearly straight, slightly bent to the left at base ; cal- lus thin, showing several spirals passing into the interior, one on the central part almost might be called a plait. Length 12; breadth of body-whorl 6 mm. Newton, Miss. Lower Claiborne horizon. Pleurotoma (Bathytoma) marieana, n. sp. Plate II, fig’s. 3, and Plate III, fig. 1 Shell small, whorls six, the first smooth, the next with spiral lines and a few faint axial ones ; body-whorl profuse- ly ornamented, cancellated, the periphery of this whorl car- rying three close-set spirals which give the appearance of a raised, beaded line ; the space between the periphery and the suture strongly concave aud carrying the retral sinus ; suture distinct. Woods Bluff horizon, six miles east of Thomasville, Ala. This little species is represented by two specimens both of them young. The figures do not show the periphery of the body-whorl correctly. Scobinella sculpturata, un. sp. Plate II, fig’s 4, 5 Shell rather small, solid ; whorls eight, ornamented with close-set ribs oblique to the vertical axis; suture bordered above by a strong nodulous spiral ; body-whorl marked by numerous spiral lines, which cut into the ribs much the same as in Scobinella elaborata, Con. Sinus semicircular, car- 7 ALDRICH, EOCENE FOSSILS 7 ried on a concave plate or shoulder. Aperture smooth within. Length 2; breadth of body-whorl 3 mm. Hatchetigbee Bluff, Tombigbee River, Ala. Bittium (Stylidium) anita, n. sp. lace IOL, sey 6 Shell small, rather solid ; whorls seven to eight ; apex pointed, embryonic whorls smooth, the balance with six or more spiral impressed lines ; suture distinct, whorls slightly shouldered ; aperture ovate spirally striate within ; columella somewhat bent and reflected below ; canal slightly twisted. Length of largest specimen 5.5 ; breadth 2 mm. Six miles east of Thomasville, Ala. | Woods Bluff hori- zon. Thats clarkensis n. sp. . Plate Ii fic. 2 Shell small, whorls six, the first three and a half smooth, embryonic, the others marked by slight folds axially raised; shell somewhat shouldered at the suture ; body-whorl expand- ing rapidly ; outer lip bordered by a raised and reflected process, flattened somewhat within and carrying a few rais- ed but very small tubercles on the inner part of their edge ; columella slightly concave with a constriction at the beginn- ing of the canal which is is short, rather deep and bent to the left ; callus rather strong, broken at base, exposing a slight umbilicus, but probably in perfect specimens the um- bilicus is covered. A few faint spiral spaces appear on the body-whorl and the next younger. Height 9; breadth of body-whorl 7 mm. Woods Bluff horizon six miles east of Thomasville, Ala. 8 BULLETIN 22 8 Turbonilla (Mormula) mitchelliana, n. sp. Platem Uber ineees Shell medium ; spire smooth, embryonic whorls bent to one side and partially immersed ; whorls nine, surface smooth, shell shouldered at suture and compressed below same. Inner lip reflected and bearing one fold ; outer lip sharp, striated with- in. The body-whorl is large ; looking down on the shell from the apex the suture seems to cut under the whorls. Height 7.5 ; maximum diameter of body-whorl .2.5 mm. Six miles east of Thomasville, Ala. Woods Bluff beds. This species is about the size and shape as 7Jurbonilla an- zta Aldr. but has no spiral lines, also carries a prominent fold on the columella. Dr. P. Bartsch has kindly determined its generic position. - Eulima extremis, 1. sp. Pate tiie hga a Shell polished ; whorls nine or ten ; suture very shallow showing indistinctly ; aperture elongate ; outer lip slightly sin- uous ; inner lip reflected over the lower part of the pillar. Length of longest specimen 7 mm. Claiborne Sand bed on Tombigbee River about one mile above St. Stephens, Ala. Also at Claiborne. This species is longer than &. acculafa Lea, and more slien- der, that species averaging about eight whorls, while this has nine to ten. All specimens of this species show a broad con- striction below the suture, and even retain some traces of a col- or band there. The suture in Lea’s species is plainly marked. Eulima lugubris Vea has a more circular aperture, a more thick- ened and reflected columellar callus and is broader. 9 ALDRICH, EOCENE FOSSILS 9 Cerithiopsts greggiensis n. sp. elle JOOL. ine 5 Shell small ; whorls rather rapidly expanding ; ornament- ed with three .rows of tubercles which do not coalesce either spirally or axially as in some specimens of the genus ; en- tire surface covered with fine, close-set, spiral lines ; suture deep ; base with spiral lines, some coarser than others; col- umella smooth ; spiral lines superimposed upon the other or- namentation ; row of tubercles just below and bounding the suture composed of smaller and more closely set ones than in the other two rows. The specimen is fragmentary. Breadth of body-whorl 3 mm. Gregg’s Landing, Alabama River, Ala. Retusa clatbornensis, n. sp. Jess JOC 36ye25 Shell small, showing lines of growth, not polished ; with- out revolving striz ; spire sunken ; edge of the pit rounded over, aperture longer than the body of the shell, narrow above, widening below ; outer lip sharp, simple, straight, rounded below, pillar twisted, ridged and somewhat reflected. Length 2.5 mm. Claiborne, Ala.; in the sand bed. Odostomia (Pyrgulina) clatbornensis, n. sp. Plate m Ve etioe at Shell elongate-ovate ; nuclear whorls obliquely immersed ‘in the first of the post-nuclear turns ; post-nuclear whorls well rounded, narrowly shouldered at the summit, marked by feeble, slightly protractive, axial ribs which are best developed near the summit and gradually decrease in size as they approach the suture ; of these ribs 20 occur on the first and second, and 26 upon the penultimate turn. In addition to the axial IO BULLETIN 22 Io ribs the whorls are marked by subequal and subequally spac- ed, incised, spiral lines, of which 12 occur between the first and second, and 17 upon the penultimate turn ; suture mod- erately constricted ; periphery and the rather long base of the last whorl well rounded, marked by the feeble extension of the axial ribs and about 18 incised, spiral lines which equal those of the spire. Aperture elongate-ovate ; posterior angle acute ; outer lip rather thick ; columella short, curved and reflected over the reinforcing base, anterior edge only being free ; parietal wall covered with a thin callus. Claiborne Sand bed; Claiborne, Ala. The fold is faintly perceptible from the outside. Very rare. Height 3.5 mm. This shell has a strong resem- biance to Welania claibornensis Heilprin. ‘That species is rep- resented with seven whorls and is more pointed, narrower, with a much smaller aperture, judging from the figure of the type with which I have compared this form. Turbonilla (Pyrgiscus) agrestis, n. sp. Plate IV, fig. 2 Shell small, only 5 whorls represented in type; surface with four raised revolving lines, increasing to five on the body-whorl , with the same number upon the base. There are numerous raised axial ribs across which the spirals pass. Umbilicus closed ; aperture ovate ; columella somewhat twisted. Width of broken scecimen, r mm. Hatchetigbee Bluff, Tombigbee River, Ala. A strongly marked species ; quite distinct. Levifusus trabeatus Con., var. Plate V, fig. 3 This is another variation possessing a revolving row of incipient spines at the periphery with another finer line below. It is much more like Fulgur in shape and is evidently a con- necting link. The outer lip is lirate within. II ALDRICH, EOCENE Fossiis II A variety of Levzfusus supraplanus Harris is also figured, Plate IV, fig. 4, which rather connects the form with Fzsus (Levifusus) sutert nobis, seems to be distinct from other forms, yet these species vary so a lot may go into one basket eventu- ally. Levifusus pagoda, Heilpr., var. Plate IV, fig’s 5, 6 Differs from all other forms described by its possessing two raised, revolving lines, slightly tubercular. Specimen figured is from Woods Bluff, Ala. It also occurs at Matthew's Land- ing, Ala., in the Midway horizon, The variation in this and other species of Levifusws are greater than generally recognized. One form in my collection of this species has two rows of tuber- cles at the periphery of the body-whorl. both equally prominent, still another form has the single row at the periphery followed below by five or more pairs of raised lines running in couples. This form occurs at Yellow Bluff, Alabama River, Ala. Plate IV, fig. 7 is another form that may equal Lezzfusus indentus Harris, I have no doubt several of these so-called species will be united upon future study. LYRISCHAPA, nov. gen. Shell medium; apex bulbous, the initial point below the tip and buried in the same. Three other whorls, flattened above, ribs becoming spinose above ; revolving lines numerous. Inner lip lirate. Type described below. Lyrischapa harrisi, nov. sp. kee IOVS ine, oS Shell medium ; Scaphelloid in appearance ; surface car- rying eleven strong, elevated ribs which become spinous at the shoulder ; surface also ornamented with numerous close- set revolving lines, coarser near the base ; the entire inner lip with lirze. Length 18 ; width at shoulder 10 mm. Three and one-half miles south of Quitman, Miss. m2 BULLETIN 22 12 Lower Claiborne Eocene. This shell is probably the same as figured and mentioned bye Dr Dally (Azar saaacrictg whine MSEC AOU De 77k 6, fig. 5a). It is not a Voluteltthes, not a Caricella or Lyria, but has.some common characters of all. Szgaretus (Sigaticus) clarkensis Aldr. Platerve tig i A specimen is herewith figured that is more characteristic than the type. All these forms including several called z- naticina by Dr. Dall should be removed from Sigaretus etc., as they are Naticoid as first observed by Professor Harris. Discohelix texana, n. sp. Platem Vie tious eons Shell small, whorls five, nucleus smooth, showing the same as in Solarium ; the whorls following gradually developing three rows of tubercles, those on the periphery doubled ; upper sur- face flat, the space between the two keels somewhat concave and smooth. the under part excavated somewhat and marked with larger tubercles on the periphery besides a central row, smaller and more rounded. ‘These tubercles on the base rapid- ly grow smaller and disappear before reaching the umbilical area. Length and breadth about 3 mm. Smithville, Tex. Lower Claiborne Eocene. Chlorostoma nautiloides, n. sp. Plate Vi, he's 4,5, 6 Shell small, whorls five, flattened above, rounded below ; surface covered with fine revolving lines which are coarser on the base ; ambilicus open, deep, with a revolving line proceed- ing from the lower part of the aperture and revolving into the 1 ALDRICH, EOCENE FOossILs 13 umbilicus. Interior nacreous. Height, 1.5 ; greatest diameter, 5 mm. Claiborne Sand, Claiborne, Ala. This little species may equal one of the species described by DeGregorio, but all his species appear to be smooth. Neritina unidenta, n. sp. Je iletie WW eS Fg 8 Shell smooth, rather small, showing the epidermis and a few lines of growth underneath. The spire is worn off. Shell rather quadrate: outer lip sharp, inner lip flattened, callus reflected, pillar bearing one large tooth curving down- wards into the interior. The color markings are retained, composed of close-set, dark brown broken lines, the entire sur- face being covered. Height 7 ; maximum diameter 8 mm, Woods Bluff horizon, six miles east of Thomasville, Ala. This is the first undoubted Eocene Verztina from Alaba- ma, and is interesting because there is a living form in the Coosa and Cahaba rivers of Alabama. Neritina pupa Lin. from Cuba has also a faint fold in- side the pillar lip, which rapidly disappears, probably absorb- ed. eritina showalteri Lea has no dentition on the pillar. Argyrotheca dallt n. sp. elatis OW, eS G, LO Shell quite small ; dorsal valve oval, exterior with about fourteen folds radiating from the beak. Surface covered with fine lines, andalso finely perforated ; within also finely perforat- ed but the perforations do not seem to extend through the shell. Median septum strong, elevated, reaching nearly to the base. Height 4; width 4.5 mm. 14 BULLETIN 22 Pe Hatchetigbee Bluff, Tombogbee River, Ala. Dorsal valve only known. ‘This genus is new to our Eo- cene. t5 ALDRICH, EOCENE FossILs Explanation of Plates 15 16 Fig. I, TONES 2. BULLETIN 22 PLATE I Page Crassatellites (Crassinella) aldrichianus Har...........-....,.. a @riclarkensisy Aldea sese nec pee oes SRR a ROH RE RAN cere Bi Cardium (Trachycardium) claibornensis Ald.................. a Atel bras, (Avoyeqnilins)) jortovlernag BUG lon cocaccscasccasoccsdsencasenanese 4 dielilimatem pera tay All deereeene-seseeeeneeh eee reer ec ete eee ence eees 4 Envaltarmieyert Al dic.cow.d sec canecsececanae se acters eacnaen erences 5 16 VGESy BULL. AMER. PAL. NO 22 Real a = Me ‘ S os 18 Fig. Retusa claibornensis Ald BULGE N22 18 PIL ANI, JO Page Avera tescartia AU sens Se Cia: ie gmee iin ata ete teat ate 5 ScopirrelilameytonensSisy Al Giese peers te tele 5 Pleurotoma (Bathytoma) marieana Ald.................. 6 , ScoOoimealle, genlhowmremz, AWCl 5. 5505000 soocosnconasscosoascee. 6 Bittium (Stylidium) anita Ald 7 NOTES 2V BULL. AMER. PAL. NO: 22; PL. ( <1 ioe DIMOION ION t- sor ee 20 Fig. PRO YP w BULLETIN 22 PLATE Il Page Pleurotoma (Bathytoma) marieana Ald...............scceeeeee 6 Phaisiclarkensis Ald o.s.ccss.g8ee ie nen ceeoeawemerceane ceceone een ese 5] Turbonilla (Mormula) mitchelliama ..................:secceceeeee 8 Hulima jextremis Ald\n....-cdocss.co vocceacessescocacenco0teec6e 08 Dorsal view, showing a portion of the anal tube. Mariacrinus showing uniserial arms. Melocrinus showing biserial arms. Fig’s 4 and 5 are from Wachsmuth and Springer. Trichotocrinus showing branches of its biserial arms....... 36 NO. 23, PL. 6 BULL. AMER. PAL. VOEZ 5 i 4 0 i fig a 1 Be te Bale Ail BS 14 BULLETIN 26 38 PLATE 7 Page Fig. 1. Melocrinus reticularis, 1.SPp...-...eccveeeeseeecceseneceneescenentecens 5 Exterior impression of dorsal cup. 2. Echinocaris punctata (Hall) Whitt............2...eeeeeeeeseeeeeee 7 Valve from Ithaca beds. 3. Echinocaris punctata(Hall) Whitf. Exterior impression.. 7 Cast of specimen shown by Fig. 3. VOL. 5 BULL. AMER. PAL. NO. 23, PL. 7 Path ay hyas a Then Et Pa ae ; fas =Ty RNs Oh Aa al Vol. 5 BULLETINS OF . AMERICAN PALEONTOLOGY No. 2 4 NEW AND INTERESTING NEOCENE FOSSILS FROM THE ATLANTIC COASTAL PLAIN BY AXEL OLSSON December 7, I9T4 Cornell Univ., Ithaca, N. Y. Us S.vA: Harris Co. NEW AND INTERESTING NEOCENE FOSSILS FROM THE ATLANTIC COASTAL PLAIN Content: Lxtroductory remarks — Description of new species — Changes in specificnames — Noles on the correlation of certain Miocene beds in the James river valley INTRODUCTORY REMARKS During the past summer (1914), six weeks were spent with the cruiser Ecphora, under the personal direction of Professor G. D. Harris, in studying the Miocene formations as exposed along Chesapeake bay and in the James and York river valleys, Virgin- ia. Asa result of this work, a large amount of Miocene materi- al was collected ; and it is from this source and from the material collected on similar expeditions in 1896, 1897 and 1898 that the following species were obtained. These new shells are from the following states, viz., Virginia, North and South Carolina and Florida. < I, moreover, take this occasion to make a few changes in the names of certain Miocene shells which have been found to be pre- occupied. Lastly, I wish to make a few remarks concerning the correlation of certain Miocene beds in the James river valley. I wish here to thank Professor Harris for the very numerous favors received during my Tertiary work. Ney Paleontological Laboratory, Cornell University, December 1, 1914 AXEL OLSSON 45 OLsson, NEOCENE FOssILs 7 DESCRIPTION OF SPECIES Nassa cornelliana, n. sp., Plate 4, Fig. 11 Shell small, heavy, elongate; with three and a half smooth nuclear and four subsequent whorls; suture appressed; the first sculpture to be introduced is a transverse ribbing ; this is soon fol- lowed by four impressed revolving lines ;on the body whorl the transverse sculpture consists of seven or eight large, thick ribs, and these are continued in the same line across the earlier whorls, in- terrupted at the suture; on the body whorl the transverse ribbing is crossed by about nine impressed revolving lines which on the middle of the whorl are separated by wide bands but become more crowded at the base and next to the suture; on the earlier whorls only four revolving lines are present; the ribbing is made only slightly nodose by the revolving lines and there is no pronounced shoulder to the whorls; canal short, straight, with numerous re- volving lines and separated from the rest of the shell by a moder- ate sinus; mouth subovate in shape, with a small sulcus at the pos- terior commissure; outer lip thickened and with about seven lire, which alternate in strength; pillar lip callous, smooth and with a raised border; siphonal fasciole strong. Fleight 5, greater diameter 2.5 mm. This species is characterized by its elongate shape, impressed revolving lines and the strong, transverse ribbing. Its nearest related form appears to be WV. caloosaensis Dall, but differs from that species in its more elongate form, lack of the shoulder on its whorls and its larger size. Duplin Miocene(?) ; Currie, N. C. Lirosoma sulcosa, var. multicostata, n. var., Plate 5, Fig. 13 Shell of the general shape of C. su/cosaCon., but usually smaller, with the anterior canal more produced ; body whorl two- thirds the length of the shell : surface of shell strongly sculptur-. 8 BULLETIN 24 46 ed with 9 to 11 raised revolving ribs, separated by as wide or wid- er interspaces ; on the body of the whorl the ribs become more numerous, also finer on the anterior canal ; the suture, bordered by a flattened area which generally carries a single carination ; the revolving lines are additionally crossed by wave-like lines which are parallel to the growth lines and cause the carination of the ribs. Fleight 20, greater diameter rz mm. (Specimen figured) This shell when not full-grown appears perfectly distinct. In its later development the shell does not increase much in height but becomes more globose, like the typical form. It is then dis- tinguished by its more numerous revolving ribs and in having generally the flattened area next to the suture with a carinated line. Yorktown formation : Kingsmills, Grove Wharf Typhis harrisi, n. sp., Plate 2, Figs. 7,9 Shell of moderate size ; whorls polished; whorls about 5, with 4 large, thick varices, which on the body whorl extend com- pletely across the whorl and onto the anterior canal ; between these are shorter varices which continue only to just below the middle of the whorl; the varices carry on the shoulder of the whorls a hollow, recurved spine ; these are generally broken off, and represented only by hollow stumps; whorls above the shoulder are irregularly flattened and with the suture appress- ed; on this area only the smaller varices continue across to the suture; surface of shell smooth with only growth lines which extend up onto the spines ; the varix next to the mouth carries about four raised ridges which are placed at right angles to the aperture; on the body whorl resting marks are indicated by raised lines between the varices and representing the aperture and each of the larger varices have on their summit a wavy line formed by raised ridges corresponding to those at the aperture ; canal broad and flattened, recurved and ending in a hollow stump which probably represents the base of a recurved spine ; aperture round or subovate with a raised rim. Fleight 20, diameter 13 mm 47 OLsson, NEOCENE FOSSILS 9 This 7yphis is distinct from the other representatives of the genus in the Tertiary. The species finds its closest related forms in the Oligocene and Pliocene of the Floridian region. Florida ; Miocene of the upper bed at Alum Bluff. Pyrula jamesi, n. sp., Plate 5, Fig’s 14-16 Shell small, globose, moderately heavy; whorls about five in number ; the last or body whorl large, inflated and covering a little more than two-thirds of the preceding ; spire pointed ; sur- face sculptured with plain raised revolving ribs, separated by broader interspaces ; revolving ribs about 22 in number ; these are regularly spaced on the body whorl but become smaller and more irregular on the anterior canal ; suture bordered by one of these ribs, and separated by a broader interspace than usual ; in- terspaces with fine, raised and closely spaced lines which are par- allel to the growth lines; mouth large; canal slightly oblique ; coluniella more or less callous. Length of type 12, diameter 7.5 mm. Length of the larger specimen 13.5, diameter 8.5 mm. From the Maryland Miocene another species of this group was described by Martin as Pyrula harrist. This is a Calvert spe- cies and characterized by its shorter spire, and much more nu- merous finer, revolving ribs. Yorktown formation , James river at Kingsmill. Solariella shacklefordensis, n. sp.. Plate 5, Fig’s 5,6 Shell of medium size, pearly ; whorls about six in number ; nucleus very small; earlier whorls with two carinated ribs, one at the angle, the other about the middle ; upper surface of whorl smooth and with oblique wave-like undulations which cause the granulation of the revolving ribs ; suture of the later whorls grad- ually advancing down so that additional revolving ribs and lines are brought to view ; on the body whorl a smaller faint revolving line is introduced between the two carinated ribs; in addition there are two plain ribs below the carinated ones, the lowermost being the largest ; base of shell with about five revolving, plain ribs; umbilicus deep and bordered by a strongly carinated rib ; IO BULLETIN 24 48 interior of umbilicus smooth with a single revolving line and crossed by transverse ribs. fleight of type ro, diameter ro mm. A second species of So/arzella is found commonly at various localities in the Yorktown formation in Virginia and which I have identified with Tuomey and Holmes, 7vochus gemma. I have fig- ured a specimen from Grove Wharf on Plate 5, fig’s 7, 8, 9. Dall in his Tertiary Geology of Florida units with Toumey and Holmes species the recent Lzotiza tricarinata Stearns, under the name ot L. gemma. L. tricarinata is also a Miocene shell. I have speci- mens from Wilmington, Magnolia, Neuse river, N. C. This last-mentioned species is typically much smaller, generally with a smooth base or at least with only faint revolving lines and lastly with a strong carina bordering the suture. Solariella shakleforden- sts may be distinguished from S. gemma in having only two strong- ly carinated, ribs more numerous, smaller, plain, revolving lines. St Mary’ s formation (?), Shakleford, Va. Teinostoma (Solariorbis) variabilis, n. sp., Plate 5, Fig’s 1-4 Shell small, solid, rather depressed, but with a slightly point- ed spire ; umbilicated ; whorls 4, enlarging uniformly ; periphery of last whorl, slightly angulated ; suture impressed ; sculpture variable, consisting of simple riblets, crossed by oblique, spi- ral strize ; on the earlier whorls, these riblets are most pro- nounced, becoming gradually obsolete and wave-like on the later; spiral striae persistent ; in some cases the riblets may also con- tinue over a larger portion of the later whorls than usual ; base of shell strongly sculptured, the riblets being here persistent ; in old shells a gerontic stage is introduced, coming after a resting stage and this is characterized by an entire lack of sculpture ; aperture rounded or slightly oblique, and with the edge bordering the um- bilicus thickened ; umbilicus deep, not bordered by a ridge or carina. Greater diameter 2, height r mm. This species is characterized by its variability. From 7. zz- 49 OLssON, NEOCENE FOSSILS II dula Dall and 7. greensboroense Martin the species may be distin- guished by its lack of the carina which occurs on the periphery of those shells. It is probable.that H.C. Lea’s Delphinula obligue-striata belongs in this genus. This last-mentioned species has the radiating ribs divided into 2 or 3 branches near the peri- phery, with the umbilicus bordered by a slight, carinated line. Yorktown formation , Yorktown, Va. Pecten (Pecten) smithi, n.sp., Plate 4, Fig’s 1, 2 Left valve small, thin, flat with a slight depression at the beak ; shape ovate, as high as broad ; ribs about 20 to 22 in num- ber, low and separated by flat interspaces, about twice as wide as the ribs ; ribs becoming obsolete on the anterior submargin (and probably also on the posterior) and are here replaced by a rather prominent ridge ; ribs and interspaces at first crossed by concen- tric lamellose lines, which also pass over the submargins and on- to the ears ; these concentric lines are equally spaced and the lam- ellaze appear to have been originally roof-like, passing from one line to the other ; this concentric sculpture is developed for a time and then suddenly ceases, the remainder of the shell having only the ribs ; interior of shell smooth, lirated by the ribs. fleight 26, apparent width 29 mm. The above description is based on two imperfect left valves. Both are from Kingsmill, Virginia. On the smaller shell, the con- centric lines cover the entire shell. On the larger this sculpture is lacking from the basal part, having disappeared suddenly at a time when the shell had reached the same size as the smaller shell. Yorktown formation, Kingsmill, Va. Pecten (Nodopecten) vaccamavensis, n. sp. Plate 1, Fig. 1 Shell rather large ; valves of moderate but equal convexity ; left valve with about seven narrow, elevated ribs which are slight- ly nodose at more or less equal radial distances from the beak ; interspaces very wide and with about 4 or 5 longitudinal lines which are made slightly setose by the equi-distant, elevated, con- centric lines ; anterior and posterior marginal slopes, abrupt ; ears flat, with narrow riblets, slightly imbricated by the concentric 12 BULLETIN 24 50 lines which are here rather closely crowded. Left valve (not well preserved in type specimen) with seven or eight very wide ribs, separated by narrow and deep interspaces. Length 70, width 68, thickness 18 mm. The specimen above described is from the Cornell Univers- ity collection and labelled as Miocene of Lake Waccamaw, N. C. When more is known concerning its exact stratigraphic posi- tion the species may prove to be Pliocene, as is also the case with Modiolus gigantoides, The specimen is not well preserved, being a large cast, with a portion of the shell of the left valve still re- maining. Three of the ribs are much more prominent than the other four, but apparently all were introduced at about the same time. These three ribs, together with the rather angular submar- gins, give the shell a quinquecostate appearance. Miocene (?), Lake Waccamaw, N.C, Modiolus pulchellus, n. sp., Plate 4, Fig’s 12-14 Shell small. smooth, convex ; beaks low ; anterior end very short, posterior slope even, not depressed ; posterior end of hinge line evenly rounded into the base ; anterior margin with a slight- impressed zone ; surface smooth, with incremental concentric lines which are occasionally deep and then represent resting stages ; ligamental sulcus deep and narrow, with finely crenulated edges. Length 9, width 6.5, thickness 3.5 mm. This species in its general shape recalls J/. szlicatus Dall (as M. tampaensts, P\. 27, fig. 28) of the Upper Oligocene of the silex beds at Ballast Point ,Florida but is a smaller shell. The posterior extremity in JZ. szlicatus according to Dall’s figure appears to be slightly depressed and with the anterior margin wide and flat. In the Miocene shells the anterior margin carries a small tooth-like projection. The crenulation of the ligamental sulcus is also a con- stant character and is well-marked in both valves. Shell generally thin but occasionally quite heavy with deep muscle scars. Yorktown formation : Kingsmtll (type), Grove Wharf. 51 OLsson, NEOCENE FOSSILS 3 Modiolus gigantoides, n. sp., ; Plate 2, Fig’s 1-3 Shell large, heavy, convex, elongated ; beaks placed rather near the anterior end of the shell ; anterior end narrow ; shell highest just about the middle ; posterior end acutely rounded ; dorsal margin straight and deflected at an angle of about 30° ; an- terior portion with two well-marked depressions extending from the beak to the basal margin, and witha prominent ridge be- tween ; surface marked with coarse lines of growth with little or no signs of resting stages; anterior end slightly projecting be- yond the beaks, with thickened lamellar margin. Length 98, height 50, thickness 39 mm. This species is characterized by its large size, convexity, heavy shell and the lack of the prominent, impressed, dorsal area of W/. ducatelli Con. From M7. gigas Wagner to which it is al- lied most closely, a marked difference isfound in its much less expanded posterior end, greater convexity and less pouting anter- ior end.. MW. gigas has for some time been considered as doubt- ful because of its rarity and abnormal appearance. Last sum- mer, however, asingle, more or less imperfect specimen of a Aod- zolus was collected at Yorktown which agrees in all essential char- acters with the figure of 7. g7gas except in the matter of size, the specimen measuring 65 mm. in length. This shell possesses the wide, expanded posterior end but lacks the less pouting anterior end. Miocene(?), Lake Waccamaw, N. C, Lithophaga yorkensis, n. sp., Plate 2, Fig’s 5, 6, 10 Shell small, thin, in shape more or less like Lzthophaga aris- tata Dillwyn but differs in being constantly shorter and in lack- ing entirely the twisted process which projects from the posterior end of that species ; surface smooth, with only very fine growth lines and occasionally incised lines, representing resting stages ; a ray extending from the posterior end of the shell to the beak along which the resting marks are well developed ; five or six discontinuous faint raised lines extend from beak toward basal margin in a posterior direction ; shell loosely surrounded 14 BULLETIN 24 52 by a calcareous deposit, terminating in siphonal tubes. Length 14, height 6, thickness 5 mm, This species is quite different from the other described Mio- cene Liothophagus. L. subalveatus Con. has a wide medial furrow and obliquely produced posterior end. L. zonenszs Glenn is charac- terized by its broad posterior portion. ZL. yorkenszs on the other hand shows relations with the recent Z. avistata Dillwyn, as indi- cated above. In the case of the recent shell, the posterior extremi- ty is twisted and attached to the calcareous shell which surrounds it. The Miocene shell is perfectly loose as shown in figure Io, Plate 2. Conrad appears to have had a specimen of this species, as a fair but characteristic figure is given on Plate 3, figure 1 of Kerr’s Rept., N. C. Geol, Survey but unaccompanied by either name or description. Yorktown formation ; Yorktown (type) ; Bellefield, Va. Spisula (Hemimactra) harrisi, nu. sp., Plate 1, Figs 5, 6 Shell large, thin, subtrigonal in shape ; beak narrow and pointed, markedly curved anteriorly, over the impressed anterior submargin ; anterior end slightly longer than the posterior, anter- ior submargin dorsally impressed and flattened, becoming depress- ed near the basal margin ; posterior dorsal margin impressed and flattened its entire length and with a furrow extending from un- derneath the beak, and becoming rapidly obsolete and terminating at about one-half of the distance along the dorsal margin measured from the beak ; surface smooth, on the center of the shell disk, very irregular with growth lines along the basal margin ; a fine longitudinal line along the angle bounding the impressed postero- dorsal submargin ; on the dorsal side of this line the growth lines are very coarse, becoming smooth again on the furrow ; hinge agreeing with that of S. curtidens Dall, but slightly less heavy. Fleight 105, width 122, thickness 42 mm. This species is closely related to S. curtidens Dall. Compari- sion with Dall’s type in the National Museum however shows that the species is distinct. These differences may be noted. S.har- vist is slightly less heavy, the dorsal submargins are more 53 Orsson, NEOCENE FossILs 15 impressed and flattened; beaks more inclined anteriorly and with the furrow extending further underneath the beak on the an- teriorand posterior submargins ; umbo narrower with more pointed beaks. The anterior dorsal submargin of S. curtédens appears from the fragmentary type to have been more depressed. Dulpin formation ; Peedee river ?, S. C. Ensis schmidti, n. sp., Plate 3, Fig’s 1-3 Shell large, thin, elongated but fairly wide, gaping at both ends ; dorsal margin straight, but with the beaks curved upward ; basal margin of shell evenly rounded ; posterior extremity round- ed or truncated ; anterior extremity obliquely truncated with a low furrow extending fromthe beak, parallel to side ; surface smooth, polished, growth lines most strongly developed on the posterior portion of the shell ; there is a faint indication of two or three rays extending from the beak to the posterior portion of the basal margin ; left valve with three teeth, right valve with two teeth ; anterior muscle scar very elongated. Length (type) 94, height 28, thickness 12 mm. This species is very different from any of the other Miocene Enses. From these it is distinguished by its relative shortness, height, and large size. At the type locality the species occurs in a yellow sand and is not uncommon. Yorktown formation ; Jack's Bluff on the Nansemond river, Va. Also at Suffolk, Va., at the Standard Oil tanks. Semele nelliana, n. sp., , Plate 3, Fig’s 5,6 Shell large, thin, inequilateral, moderately inflated ; the an- terior end longer than the posterior; beak small and pointed. slightly rounded or obscurely truncated ; basal margin obliquely rounded ; posterior dorsal slope slightly impressed ; lunule of left valve very small ; sculpture of two kinds, a radial and a concen- tric ; radial sculpture very distinct, of threadlets, rather low, wide (on the maiddle of the shell disk of an average width of .75 mm), 16 BULLETIN 24 54 and these are separated from each other by impressed lines ; these radial threadlets become much narrower on the anterior submar- gin, obsolete on the posterior dorsal slope ; concentric sculpture of evenly spaced, distant, high lamellz, becoming lower and more closely spaced on the umbo; on the posterior dorsal slope the la- mellz are more crowded, wavy and irregular in direction, but show little or no compression; the radial threadlets are continued on the lamellee and end just below the top; the lamellze are there fore not crenulated. Length 56, height 44, depth of valve 9 mm. This fine shell belongs to the group of Semzeles represented in the Oligocene by S. chzfolana Dall and perlamelloides Maury and in the Pliocene by S. /eaxa Dall and S. perlamellosa Heilprin. The only species with which comparison is necessary, is 5S. leana, which has much the same contour. In the Miocene shell here described, the concentric lamellz are much less numerous, higher, and more distantly spaced, the radial threadlets coarser, and these do not crenulate the concentric lamellze. The posterior extremity of S. /eana is markedly truncated and with the poster- ior dorsal slope strongly depressed; and here the concentric lamel- lze are low, crowded and flattened. S. pevlamellosa on the other hand, is more nearly equilateral, more elongated and with the sculpture much like S. /eana. Duplin formation, Peedee river? S. C. Petricola (Claudiconcha) grinnelli, n. sp. Plate 4, Fig’s 7-10 Shell elongated, solid, often distorted ; anterior end rounded; posterior end elongated, pointed ; right valve slightly larger and overlapping the left, especially on the posterior, dorsal margin ; surface sculpture of irregular, radial strize, which asa rule, are slightly larger and separated by wider interspaces on the anterior portion of the shell ; strize more or less granulated by concentric lines : hinge weak, with slender teeth, those in the specimens broken off, but, judging from the stumps remaining, consisting of three cardinal teeth in each valve. Type specimen: Length 22, height 13, thickness 12. mm. A large valve: Length 25, height 16, thickness 7 mm. The subgenus Claudiconcha Fischer as exemplified by P. mon- 55 OLSSON, NEOCENE FOssILs 17 strosa Gmelin contains shells which have the right valve slightly larger and overlapping on the left. This species probably burrowed in the sand. The Miocene shell compares well with the type form of this subgenus but possesses a much more degenerate hinge. Yorktown formation, Janes river, 5 miles north of Smtth- eld; Bellefield. Erycina regifica, n. sp., Plate 4, Fig’s 3-6 Shell small, thin, moderately convex, very inequilateral; an- terior end much longer and with the beaks situated near the post- erior end; posterior extremity well-rounded, the anterior more pointed; surface sculptured with obsolete concentric lines, which occasionally are wave-like on the middle of the shell surface, in add- ition a peculiar hair-like, radial sculpture is present and quite pro- nounced over the greater portion of the shell surface, but lacking from the umbones ; umbones smooth and polished ; hinge strong, with a single, small, cardinal tooth and two lateral laminz in each valve ; interior smooth, with the muscular scar well marked and with obscure radial rays. Length 7.5, height 5.25, thickness 2.5 mm. This species is readily distinguished by the peculiar, sharp, hair-like, radial striz. In shape the species recalls Z. carolinen- sts Dall, but is much more inequilateral. Its hinge is well devel- oped, with the cardinal and lateral lamelle rather close together, and in this feature suggestive of Lefton. Duplin Miocene of South Carolina, Peedee river ? Bornia virginiana, n. sp., Plate 2, Fig’s 4, 8 Shell oblong, thin, convex, inequilateral ; beak with the pro- dissoconch evident, slightly recurved ; hinge normal, with the lamellee of the right valve slightly shorter; surface polished, with regular, impressed, concentric lines and with occasionally more distant ones representing resting stages ; a slight, broad fur- row extends from the beak to the basal margin; anterior and posterior ends with 3 or 5 radial plications which crenulate the basal margin ; basal margin with a flat broad ribbon. fleight 5.5, width 7.5, thickness 2.75 mm. 18 BULLETIN 24 56 This species bears much resemblance to the common Miscene B. mactroides. Its most distinguishing characteristic is the radial plication. These plications are strong in full-grown shells but in immature shells show only as broad crenulations of the basal mar- gin. B. virginiana is more elongated, more convex and with a less polished surface. Yorktown formation ; Grove Wharf, Kingsmill, James riv- er near Smithfield. Rochefortia (Pythinella) filicaticola n. sp., Plate 5. Bigis) 10-12 Shell small, elongated and with the anterior end much produ- ced and one and a half times again as long as the posterior ; an- tero-dorsal margin straight with the extremity evenly rounded ; postero-dorsal margin curved behind the beak, becoming straight posteriorly aud terminating in the well-rounded posterior extre- mity ; basal margin with a moderately deep insinuation pointing towards the beak ; surface of shell with fine concentric growth lines and witha few resting marks; right valve with two promi- nent thickened teeth, separated by a deep notch ; in the left valve the notch is wider bordered by rather thin laminze formed by a slight thickening and beveling of the valve margin. Length 3.00, height 7.75 mm. The type specimen together with several specimens of the same species were all found inside of a gasteropod shell belonging to Latiurus filicatus Con. All the specimens had both valves in- tact so that together with their peculiar shape, a commensal or pirasitic habit on the above mentioned gasteropod may be taken for granted. In its hinge structure and shape, this species agrees well with the recent Rochefortia cuneata Verrill and Bush which is used by Dall as typifying the subgenus Pythznella. ‘The Miocene siclls appear to differ from its recent representative, in having its anterior end less elongated, anterior extremity more evenly round- ed and lastly in having the basal insinuation of its valves much more pronounced. Yorktown formation, James river, 5 miles north of Smith- fie ‘d, Va. 57. OLSSON, NEOCENE FOSSILS 19 Chione dalli n.sp., Plate 3, Fig’s 7-9 Shell ovate to triangular, slightly convex, very solid ; beaks prominent, approximate, sub-acute ; lunule lanceolate, defined by an impressed line, smooth or with lines of growth; escutcheon long and narrow, smooth ; surface of shell with thick, flattened, concentric lamelle, fairly regularly arranged on the umbo, later becoming irregular and coalescing towards the basal margin; no radial sculpture present; hinge fairly heavy, with three cardinal teeth in each valve ; pallial sinus merely a small notch ; margin minutely crenulated. Type. Length 23, height 20, thickness 6 mm. Larger shell. Lenght 25, height 27, thickness 6 mm. On page 1290 Dall, in his Tertiary Geology of Florida, vol. 3, pt. 6, briefly describes without naming a Chione from Petersburg Virginia which appears to belong to this species. This species bears some resemblance to C. cortinavia Wagner but may be dis- tinguished by its irregular concentric lamellee and the entire ab- euce of the radial sculpture. At Claremont wharf the species occurs in blue clays of the St Mary’s formation, accompanied by several unusual species. Avca virginte Wagner is very common here, and a small triangular Glycymeris like Pectunculus virginie Wagner showing relationship with G. sabovata Say, of which it is probably a mutation. St Marys formation ; James river at Claremont wharf, Va. Phacoides (Pseudomiltha) wongi, n.sp., Plate 1, Fig. 2 Shell orbicular, thin, inflated, inequilateral ; beaks small and slightly prosogyrate ; lunule very deep and oval, extending un- derneath the beak ; anterior extremity rounded, posterior extrem- ity only slightly rounded, and in the young shell verging on truncation ; dorsal margin straight, slightly angulated at the end; posterior dorsal slope slightly impressed, anterior dorsal portion somewhat wing-like and separated from the rest of the shell sur- face by irregular marks of compression ; basal margin widely rounded ; surface with irregular concentric wrinkles, which on the posterior dorsal slope are more evenly spaced ; in addition, 20 BULLETIN 24 : 58 finer incremental lines occur, and fine, radial, vermicular striz interior of shell roughened, and with a long, lucinoid anterior, muscle scar. Fleight 27, width 32, thickness 7 mm. This species resembles P. foremanz Con. of the Calvert form- ation of Maryland. ‘The shell differs in being less rotund, more inflated, thinner and with the posterior dorsal slope much less im- pressed. ‘The anterior extremity is likewise much more wing- like, with the lunule deep but short, which, in P. foremanz is typ- ically more elongated. Young shells of both P. foremanz and P. anodonta with rather thin shells usually show a strong develop- ment of radial lines or rays in the interior ; and the umbonal cav- ity is generally filled with a deposit of prismatic shell substance. The interior of the shell shows no development of these rays, Florida ; Miocene, Upper bed at Alum bluff Venericardia (Pleuromeris) scituloides, n. sp., Pate 1, Fig’s 1-3 Shell small, solid ; equilateral, convex triangular in shape ; sculpture of 7-9 flat, broad ribs separated by narrow interspaces ; umbones with the ribs coarsely or evenly granulated or sometimes smooth ; on the basal portion, the ribs are crossed by coarse con- centric lines ; lunule smooth, very deep, elongated and of a length roughly one-half the height of the shell ; escutcheon smooth, lan- ceolate ; hinge rather high and heavy ; internal margin fluted by the exterior ribs. Fleight 5.50, width 4.75, thickness 5.50 mm. This species bears much resemblance to V. seztula Dall of the Oligocene of the Oak Grove sands Florida. The most marked dif- ferences are the fewer ribs, those of V. sctftula ranging from 12 to 14 in number and in having these ribs separated by narrower in- spaces. From Il. ¢vzdentata Conrad, the species is distinguished by its fewer ribs and by its shape. florida ; Miocene of the upper bed at Alum Bluff. 59 Oxsson, NEOCENE FOSSILS 21 Glottidia inexpectans, n. sp., Plate 5, Fig’s 17-21 Shell linguloid ; elongated with the anterior extremity trun- cated ; beaks obtuse and rounded at first, later becoming acute ; lime depositing regularly throughout ; surface polished, with dis- tant marks of resting stages parallel to growth lines ; other growth lines indistinct ; sides of young shell nearly parallel or slightly wider in the middle ; no punctate structure visible with high power’; cardinal areain young shells distinct but small, grooved, not seen in older shells on account of their fragmentary nature ; ventral valve with two nearly straight laminze, which di- verge at a small angle; dorsal valve with a straight medial sep tum which does not quite reach to the posterior valve margin ; no muscle scar visible in the adult shells ; valve of young shell with the umbonal scar represented by a single, slight depression just in front of the beak; laterals by two scars separated by a short medial septum, and just in front of the umbonal scar; color of shell, which appears to be original, cream-white, yellowish brown or blackish. Length 7.0, width 4.5 mm.(vent. valve, fragment) Length 4.5, width 5.5 mm.(dorsal valve) Length ro, width 5.5 mm. (large fragment) The occurrence of this brachiopod in the Miocene is of more than usual interest as seeming to represent the sole example of the genus G/lottidia in a fossil state. The above description is based on fragments of several adult individuals and upon a score or more young shells, generally under 5 mm. in length. The young shells were all found together in the sand contained in the closed valves of a large specimen of Pecten Yeffersonius. They were ac- companied by Modiolus pulchellus, Diplodonta yorkensts and Exterior view of right valve, enlarged about 3 times. A smaller left valve. A right valve of another specimen. 70 Page tr. 49 17 55 16 54 7 45 12 50 NO. 24, PL. 11 PAL. AMER. BULL. VOL. 5 sanesniitie the OE 71 OLsson, NEOCENE FOSSILS PVA 5) (12) 33 34 BULLETIN 24 72 PLATE 5 (12) Page Fig. 1. Yetnostoma (Solartorbis) variabilis, n. sp.............0+-- 10 48 Upper view of type specimen, enlarged about 10 times. Profile view of a specimen of the same species. 3. Upper view of a gerontic shell showing the smooth later whorl. 4. A smaller specimen with the ribs and striz presistant. 5. Solariella shacklefordensiS, Wh. SPoi-...cscc.42y--csseceees-cenres 9 47 Ventral view of type, enlarged about twice. 6. Under view of same specimen. 7. Solariella gemma, Tuomey and Holmes..... ............008 10 48 Ventral view of a specimen from Grove Wharf, Va. 8. Under view of same specimen. g. Same specimen enlarged 3 times to show sculpture. 10. Rochefortia (Pythinella) filicaticola, n. sp............d..006 18 56 Interior view of left valve of type, enlarged about 8 times. 11. Interior view of left valve of type. 12. Exterior view of right valve of type. ey | LOND TAE SLUIOS,, UUM EOSATH Ly 1D, WEI sonconncooe socoenoaosooace 7 45 Dorsal view of aspecimen, enlarged about twice. TAK LY RULE J OMLEST: MIMS Peete eet oe ts ace ate Moan cntn tad asmustaee sees 9 47 Dorsal view of type, enlarged about 2% times. 15. Ventral view of same specimen. 16. Dorsal view of a larger specimen. M7 G@LOULLALORINER PECLAITS My SIO eer ee ese shin tesserae eee 21 59 Interior of dorsal valve, about twice natural size. 18, Interior of ventral valve. . 19. Interior of young shell, enlarged about 4 times. 20. Exterior of a still younger shell. 21. Basal fragment ofa large specimen, twice enlarged. VOL. 5 BULL. AMER. PAL. NO. 24, PL. 12 FF EATS aa : seal be Neh vs hep “At Vol. 5 BULLETINS OF AMERICAN PALEONTOLOGY ~- 0 No. 25 On a Restoration of the Base of the Cranium of HESPERORNIS REGALIS BY Dr. R. W. SHUFELDT December 15, 1915 Cornell Univ., Ithaca, N.Y. WiiS.. 2A: Harris Co. tae On A RESTORATION OF THE BASE OF THE CRANIUM OF HESPERORNIS REGALTIS 3y R. W. SHUFELDT In-so far as I am aware, there has not, up to the present time, been published a figure giving the probable appearance, and the various bony parts, of the cranium of that great, extinct, loon- like diver of Cretaceous times — Marsh’s Hlesperornts regaits. Disregarding a text-cut on page g of the ‘‘Odontornithes,’’ Marsh gives us, on Plate I of that work, but two natural-size views of © the cranium of 47. 7egalis which show the lost parts restored in outline. . These figures I have carefully studied and compared with several skulls of the Loon ( Gavia immer), belonging to the collection of the United States National Museum; further, I have compared the former as well as the latter with a series of photographs, sent me by Mr. Gerhard Heilmann, of Copenhagen,: which photographs were made of the cranium of the type speci- men of /7. vegalis in the Peabody Museum of Yale University, under the direction of Professor Richard S. Lull. These are help- ful, in the absence of the actual specimen; though not as much as they might be had they been obtained by a photographer of ex- perience. Unfortunately, no attention was paid to lighting, to point of view, or to the matter of reproduction of detail, while they show fairly well several other points. | Lastly, to aid one in restoring the base of the cranium of Hespervornis regalis, there are to be found still other illustrations in the ‘“‘ Odontornithes.’’ We have, on Plate II of the work, no fewer than twelve figures devoted to the teeth and osseous structures at the daszs cranii,; these will be duly commented upon as they are taken up in detail and associated in the restoration here to be made. Evidently, the first step to be undertaken is to obtain a correct outline of the base of the cranium, as the details wzthzn 4 BULLETIN 25 76 such an outline may be filled subsequently. To obtain this, I made a careful tracing on transfer paper of Marsh’s Fig. 5 of Plate I of the ‘‘Odontornithes,’’ which represents, natural size, the “skull’’ of Hesperornis regalis, seen directly from above. With the mid-longitudinal axis of the cranium parallel to the plane upon which the latter rests; the point of view from above being at the pro- per distance to a\ oid the distortion caused by being too near, and in a line perpendicular to the aforesaid plane, crossing at its middle point the transverse diameter of the cranium situated at an equal distance between its two extremitie-—is presumably the view given in Fig. 5 of Plate I ; so that, if the cranium were turned completely over and placed in the same position just des- cribed, the outlines seen would be identical, provided we regarded the cranium when thus placed from the same viewpoint. There- fore, the tracing I made of the outline of the superior view shown in Fig. 5, would be equally accurate for the corresponding inferior or ventral view of this cranium, and likewise be of natural size. Fig. 1 of Plate II of the ‘‘ Odontornithes ’’ presents the in- ferior surface of the premaxillary and maxillary bones, with a tooth (¢ ) in the groove of the latter on the left side. This draw- ing I take to be an accurate one, for the reason that all of its out- lines agree with those of the same parts shown in Fig. 5, Plate I for the superior view; consequently, as faras it would carry, I used it in my restoration, which latter illustrates the present article. The cultrate margins of the superior osseous mandible (fmx) were formed by the premaxillary bone, and, upon either side, they extended backwards for a distance of 8.9 cms., terminating at the maxillo-premaxillary suture, which is distinctly shown in the accompanying Plate. At this point the superior osseous man- dible has a transverse diameter of 1.75 cms.; and at a distance of one centimeter upon either side, posterior to it, the grooves for the teeth commenced. Each of these grooves measured antero- posteriorly, 5.2 cms., and had implanted in them, in the manner described by Marsh, fourteen teeth. Hither groove is nearly straight, and lies entirely in the outer inferior part of the maxil- lary bone on either side. The free apices of these teeth are directed | downwards and backwards, and their description has been given Ga HESPERORNIS, SHUFELDT in great detail in the ‘“‘Odontornithes.”’ Between the first and the ninth tooth on either side — the most anterior tooth being considered the first — the median por- tion of the premaxillary has an average width or transverse dia- meter of one centimeter; and, as the mesial margins of the pre- palatines (fp) are somewhat further apart than this —though they approach each other anteriorly and posteriorly — a long spin- dle-shaped hiatus results upon either side of the premaxillary. These hiatuses are also to be observed in Marsh’s Fig. 5 of Plate I of the ‘‘Odontornithes,’’ where they have precisely the same positions and apertural extent. In this figure, too, we have the point indicated, upon either side, where the maxillary (mx) gradually commences to broaden. This is as it isin most Colym- bite and Gaviide, and in all probability is quite correct. Posterior to these maxillary expansions we have the remainder of the guadrato-jugal bar upon either side ( 7-g7); and, as we have the posterior or guadrvo-jugal portions of these, there can beno doubt but that the juga/ extension forward, to join the maxillary in the case of either bar, was as we find it in Gavia immer or the Loon of the existing avifauna, the restoration of the infraorbital bar, as shown in my figure, from the maxillary(mx) to the quadrate(qz) must then be entirely correct. Marsh figures the quadrato-jugal portions in the‘*Odontornithes’’(PI.I, Fig.tand5, 97). With re- spect to the premaxillary(dmx) hesaysthat they ‘‘areelongate, and separate throughout their posterior two-thirds(Pl. I, Fig.5 ). Their extremities touched the frontals. Their sides are deeply excavat- ed for the anterior nares, and in front they are ankylosed, and forma long pointed beak, the end of which is somewhat decurved. This extremity, back to the nasal openings, has its surface fitted with irregular vascular foramina, indicating, apparently, that it was once covered with a horny bill, as in modern birds.” (P. 8.) This part of his description is probably quite accurate; and as far as it applies to a ventral view of the superior mandible, I have adhered to it in my restoration, as shown on the accompa- nying Plate. Itis all the more acceptable and likely to be correct, in as much as he, Marsh, seems for the moment to have lost sight of the ostrich or ratite skull he forever had in mind, while describing the skeleton of this great, extinct, Cretaceous diver or loon. As he makes no mention whatever of the maxzllo-palatines 6 BULLETIN 25 78 (mrp), it is fair to presume that those delicate structures were not found to be present in the fossil remains of Hlesperornis ; but, as there isevery reason to believe that the bird possessed them in its skull, I have restored them according to what we find, with respect to their morphological character, in the skulls of the Pygopodes found in the existing avifauna of this and other countries. They were most likely elongate, scroll-like bones that were well separated in the median line of the cran- ium. Turning tothe vomerine ossification, Marsh tells us, on page 7 of the ‘“‘Odontornithes,’’ that ‘‘The vomers in Hesherornis are separate, asin lizards and a few existing birds.’- They are smaller than the palatines, and resemble the vome s of Rhea, more than those of the other Ratzte. They are broadest at the base, which is obliquely truncated, and they: taper gradually to the pointed extremity in front (Plate II, figure 8). The thick, post- erior end may possibly have united with the pterygoid, as well as with the palatine. Both vomers are preserved in the skull figured on Plate I, but are displaced.’ It is true, to be sure. that we find double and independant vomers commonly among lizards ; but there are no existing birds with separate, twin vo- mers. The late Prof. William Kitchen Parker believed that they so existed in the skulls of the woodpeckers(Piccdz) ; but he was mistaken in regard to it, as both Garrod and I subse- quently demonstrated. Professor Huxley entertained the same opinion that Professor Parker did ; but, as the latter states, he had very indifferent material to study for the determina- tion of such a ‘point.* . Personally I do not believe the vomers were separate in Flesperornis, but that they were simply broken apart in the specimens Marsh examined. As to their resembling the ‘“‘vom- ers of Rhea,’’ I may say that this is by no means the case, : and much less do they in any way whatever resemble the vom- *Huxley, Thomas H.: “On the Classification of Birds ; and on the Taxonomic Value of the Modifications of Certain of the Cranial Bones Observable in that Class.’’ P. Z. .S., 1867, pp. 448-449, fig. 30. Parker, Wik, Otte bicidaere. Mi7a70Sa 517075 SOGe iS gence vol, 1, pls. 1-5 ; also article, ‘‘Birds’’, Hucycl. Brit., oth ed., vol. 111, . p. 7106. 79 HESPERORNIS, SHUFELDT a ~ er of an Ostrich.* (See Plate 2.) In Gavia immer the two halves of the single, median vomer are easily broken apart, and each part might easily be mis- taken for a sizgle vomer. Marsh’s figures of “‘vomers’’ of Fes- perornis are evidently the falves of a single, median, vomerine ossification. (“‘Odontornithes,’’ Pl. II, fig’s 8, 8a) In restoring the /acrymals, I have followed Marsh’s fig- ures and description ; he says : “‘The lachrymal bone is distinct, and articulates with the frontal, nasal, and maxillary. 1 CLOR, Gib. (D- Ga) (SES tes ie) Vassing to the palatines(fig’s 1 and 2, Pl. II), Marsh says of them that they ‘‘resemble those of the Ostrich. They are long, slender bones, extending from their union with the pterygoids, parallel with the axis of the skull, and joining the premaxillaries. In one specimen they nearly lie in position, the left palatine be- ing immediately beneath the left maxillary. In front of their junction with the pterygoid, and just anterior to their widest ex- pansion, there is a deep pocket, very similar to that in the pala- tine of the Ostrich. The anterior half of the bone is slender and ‘tapers gradually to the extremity.’’ (Loc. cit., p. 7.) The ‘‘pocket’’ Marsh refers to would probably not be in view upon basal aspect of the cranium any more than it is in the Ostrich. Such a fossa in the palatine is found in a number of the Pygopodes, and even exists in the Grebes (Podiceps cristatus, No. 18,295, Coll. U. S. Nat. Mus.). The palatines of Hesperornis in no way whatever resembled those bones as we find them in the Ostriches, as any one will appreciate upon comparing nem in Pls. 1 and 2 of the present article. Indeed, no two birds’ skulls, either of existing or extinct spe- Garrod, A. H. : ‘‘Notes on some of the Cranial Pecularities of the Wood- peckers.’’ bis, Oct., 1872, pp. 367-70. Shufeldt, R. W. : ““On the Question of Saurognathism of the Pici, and and other Osteological Notes upon that Group.’’ P. Z. S., London, pi. 1, Feb. 3, 1891, pp. 122-129. *Huxley, T. H. : loc. cit. ; figs. rand 2, pp. 420-427. Excellent cuts of the basal views of the skulls of Struthio camelus and Rhea ameri- cana are given here. While the vomers in these Ratite birds are very different from each other, they do agree in some particulars. 8 BULLETIN 25 80 cies could be more unlike each other than are the skulls of an Flesperornis and an Ostrich—the former being a toothed, Cretace- ous loon, and the latter a recent, toothless, gigantic, struthian land-bird. Their skulls are about as unlike each other as are those of a hummingbird and a kiwi. It will be observed that, in getting the outline and restoring the form of the frontal region of Hesperornis ( Fig.1 pf, fv, ), I have followed Marsh, in as much as the outline was obtained by a tracing of Fig. 5, Plate I, as pointed out in a former paragraph of the present article. Marsh states, on page 6 of the ‘‘Odontornithes,”’ that ‘‘the posterior ends of palatines,and the anterior ends of the ptervgoids are very imperfectly, or not at all, articulaced with the basisphen- oid rostrum;’’ and then, as I have already said, he again points out, on page 7, that the palatines ‘‘are long, slender bones, ex- tending from their union with the pterygeids, parallel with the axis of the skull, and joining the premaxillaries.’’ This does not militate against each pterygo-palatine articulation vesting upon the base of the sphenoidal rostum, or just beyond its base, as I have shown it in Pl. 1 of this article. In fact, if the long axes of the palatines were parallel to the ‘‘axis of the skull,’’ as Marsh states was the case, and, as he also states they had a “‘union with the pterygoids,’”’ they must have been placed as I have them in Plate 1, or quite like they are in the loons and other pygopodine birds. From Plate 1 it will be noted, too, that I have restored still another character given us by Marsh ; that is, there are pre- sent ‘‘strong ‘basipterygoid’ processes, arising from the body of the basisphenoid, and not from the rostrum, articulating with. facets which are situated nearer the posterior than the anterior end of the inner edges of the ptervgoid bones.”’ (P. 6.) As to the prerygotds and guadrates themselves, I have restor- ed them as best I could from Marsh’s figures and contour lines. He noted that the ‘upper, or proximal, articular head of the yudrate bone is not divided into two distinct heads,’’ (P.6.) and this is animportant point. Thereis no question as to his view with respect to the position of the orbital processes of the quad- rates, for thev are given in Fig.5 of Plate I of the ‘‘Odontorni- 9) BULLETIN 25 81 thes,’ while the basal or ventral view of the left quadrate is shown on Plate II. (6. ¢.). His representation of the ‘‘right pterygoid bone’’ is somewhat remarkable (PI. II, figs.7,7a and 7b), and I have restored it as best I could. From Marsh’s account, there is no question about its meeting the proximal end of the correspond- ing palatine, about its articulating with a stout facet found on the basisphenoid, and about its articulation with the pterygoidal pro- cess of the quadrate of the same side. In restoring the hinder portion of the base of the cranium, I was entirely guided by Figure 5 of Plate II of the ‘‘Odontorni- thes,’’ though I must add that I am by no means convinced as to its correctness. As Fig. 5 of Plate lin that work is given nat- ural size as well as Fig. 5 of Plate II, both being viewed directly from above, it is clear that the oud/zze of the posterior part of one should be precisely the same asthe outline of the other. This, however, isnot the case. lam therefore in doubt as to the de- tails being correct, though at this writing it isthe best I can offer in view of the fact that there are not at hand the actual specimens I should have. In any event, it will form a basis for improved res- torations in the future, the importance of which will not be ques- tioned by the vertebrate paleontologist. There is one thing, however, which the present article will accomplish : it will once and for all disabuse the mind of the paleornithologist with re- spect to there being any agreement of characters, when we come to compare the skull of an ostrich with that part of the skeleton of Hesperornts. 82 HESPERORNIS, SHUFELDT IO EXPLANATION OF PLATE 1. (13) Restoration of the daszs cranit of Hesperornis regalis. , pmx, premaxillary ; pp, prepalatine; map, maxillo-palatine; m7, maxillary ; /, frontal ; v, vomer : /, lacrymal; 7, jugal ;:f/, palatine ; Ps, postirontal Lees Jr, frontal ; g7, quadrato-jugal ; pz, pterygoid; gu, quadrate ; sg, squamosal ; eo, ee oneeatcle ; 60, basioccipital ; oe. ¢, occipital condyle. (Reduced ; the amount of reduction being easily couuanteed from the measurements given in the text. ) Pl. 13, Vol. 5 Bull. Amer. Pal. No. 25, Pl. 1 84 HESPERORNIS, SHUFELDT 12 EXPLANATION OF PLATE 2 (14) Basal view of the skull of the Ostrich (Struthio camelus) ; 3% nat. size. By the author, from specimen No. 16,629, Coll. U. S. National Museum. Bip, basipterygoid ; Qu, quadrate ; gj, quadrato-jugal ; PY, pterygoid : 7, jugal ; Pl, palatine ; A, rostrum ; v, vomer; Mx, maxillary; J/xp, maxillo-palatine ; Pax, premaxillary. - Pl. 14, Vol. 5 Bull. Amer. Pal. No. 25, Pl. 2 hi Leer i Vol. 5 BULLETINS OF AMERICAN PALEONTOLOGY No. 26 THE ECHINOIDEA OF THE BUDA LIMESTONE JEN FB, L. WHITNEY June 26, 1916 Cornell Univ., Ithaca, N.Y. UE Sr ivAy Harris Co. THE ECHINOIDEA OF THE BUDA LIMESTONE By FRANCIS LUTHER WHITNEY BIBLIOGRAPHY Agassiz, L., Description des Echinoderms fossiles de la Suisse, 1839-1840. Bose, E., Instituto Geolégico de México Boletin Num. 25, 1910. Clark, W. B., The Mesozoic Echinodermata of the United States: U.S. Geol. Survey Bull. 97, 1893. Clark, W. B. and Twitchell, M. W., The Mesozoic and Cenozoic Echinodermata of the United States: U. S. Geol. Survey Monograph, vol. LIV, rors. Conrad, T. A., Rept. U. S. and Mexican Bound. Survey, Vol. I, [Din By uesisyiy Cotteau, G., Etudes sur les Echinides fossiles du Department de VYonne 1857-1878. Cotteau, Peron and Gauthier, Echinides fossiles de 1’ Algérie, Paris, 1876-1891. Cotteau, G., Note sur quelques Echinides du terrain crétacé du Mexique. Bull. Soc. Geol. de France, 3 serie, t. xvii, 8¢o. Paléontologie francaise: Description des animaux invertébrés Vol. 7, 1862-1867. Cragin, F. W., A Contribution to the Paleontology of the Texas Cretaceous: Geol. Survey of Texas Fourth Ann. Rept. 1893. Credner, G. R., Ceratites fastigatus und Salenia texana: Zeitschr. fur gesam. Naturwiss. Vol. 46, 1875. Desor, E., Synopsis des Echinides fossiles, Paris et Wiesbade, 1858. Duncan, P. M., Revision of genera and great groups of the Echinoi- dea: Linn. Soc. Journ. Zoology, Vol. 23, 1891. Giebel, C. G. Beitrag zur Paleontology des Texanischen Kreide- gebirges: Naturwiss. Ver. in Halle Jahresb. fir 1852, 1853. Jackson, R. T., Phylogeny of the Echini: Mem. Bost. Soc. Nat. History, 1912. 4 BULLETIN 26 88 Lambert, J., Bull. Geol. Soc. France, 1902-1905. De Loriol, P., Recueil d’etude paléontologique sur la Fauna crétacique du Portugal, 1887-1888. Morton, 5S. G., Synopsis of the organic remains of the Cretaceous Group of the United States, 1834. D’Orbigny, A., Paléontologie frangaise, Description des animaux invertebres; Terrains crétacés (Echinides), Vol. 6, 1853-1860. Roemer, F., Die Kreidebildungen von Texas und ihre organischen Einschlusse, 1852. Schluter, C., Die regularen Echiniden der norddeutschen Kreide, 1883. Shumard, B. F., Paleontonlogy of the exploration of the Red River of Louisiana in the year 1852: Rept. of Capt. R. B. Maneyn Wes) Atay, ys 3% -Stoliczka, F. Mem. Geol. Survey India, Cretaceous Echinoidea, Wolke IOV neve Wright, T., Mon. British Fos. Echinodermata of Cretaceous Formations: Paleontographical Society, 1864-1882. DESCRIPTION OF SPECIES SALENITDA£ Genus Salenza, Gray Salenia volana, n. sp. Plate I, figures 1-9 Dimensions.—Diameter at ambitus, 14 mm.; height, 8 mm.; apical disk, 9 mm.; peristome, 7 mm. Description.—The test is subcircular in outline at the ambitus; abactinal surface gently convex, the sides inflated; actinal surface flat or moderately concave. The ambulacral areas are narrow, slightly undulating at the abactinal ends, widening gradually from 1.5 mm. at the apical disk to 2 mm. at the peristome. Surface ornamented with 15 to 17 alternating, imperforate, mammiullated, non-crenulate, longi- tudinally oval, primary tubercles. Situated between these on either side of the median line, especially in the region of the 89 Buna LIMESTONE, WHITNEY i peristome, are small granules. Smaller granules also encircle the plates. The pores are round, uniserial, and a little irregular in the region of the peristome. The interambulacral areas are broader than the ambulacral being 4 mm. wide in the placogenous zone, 7 mm. in the median zone, and 3.75 mm. at the edge of the peristome. They consist of two rows of large, alternating plates, five in each row. The primary tubercles decrease gradually in size from the abactinal- surface to the peristome where they are about as large as the tubercles of the ambulacra area. On each plate there is a promi- nent, crenulated boss bearing an imperforate mamelon sur- rounded by a large areola. Mammillated granules are so arranged around the margins of the plates that there are two on the upper adradial corners, while on the median margins of the plates there are from three to five. This is not an invariable distribution, for in the specimens studied, there is some change from area to area. There are miliaries between the tubercles of the adjoining plates along the median line. These are also found between the granules bordering the plates. The peristome is large and circular. The basicoronal plates bear ten moderately deep branchial incisions. The interambul- acral areas are straight between the incisions, and slightly broader than the ambulacral lips which are bilobate. The periproct is elevated, subeliptical, the posterior side being nearly straight; the anterior, subangular. The apical apparatus is large, circular, and slightly concave near the outer margins. It is composed of five ocular and five genital plates and one supernumerary plate, the suranal, which is at the center of the system. The right anterior genital plate has an incision of irregular form. This species differs from S. texana Roemer inthat it is not so elevated and has fewer ambulacral and interambulacral plates. The character of the interambulacral lips is also different, those of S. texana having two lobes whereas those in S. volana are straight. The periproct is also different in form. This species resembles S. mexicana Schliter, but it is more depressed and has 6 BULLETIN 26 90 only sixteen ambulacral tubercles whereas S. mexicana has twenty. The apical system is similar to that of S. mexicana, and has the right anterior genital plate incised in about the same manner. {In the specimens studied, there are no ridges on the plates of the apical apparatus, but they were possibly eroded away although the specimen appears well preserved. Salenia volana resembles S. prestensts Desor, but it has only five interambulacral plates whereas the European species has seven. The distribution of the granules is also different. Its general outline resembles that of S. prestensts more than that of S. mexicana. Considering the few important differences already mentioned, and the fact that S. volana occurs in the upper Ceno- manian, whereas S. prestensis is from the Aptian and S. mexicana is from the Vraconian, it seems safe to regard it as a distinct species. Since the above description was written, Dr. Bose has examin- ed the type, and he believes that it is not the same as S. mexicana Schltter. Number of specimens: 6. Occurrence: Lower division* of the Buda Limestone Shoal Creek, Austin; and Manchaca, Texas. HEMICIDARIDA Genus Goniopygus, Agassiz Gontopygus budaensts, n. sp. Plate II, figures 1-8 Dimensions.—Diameter at ambitus, 4.5 mm.; height, 2.25 mm.;: apical disk, 3 mm.; peristome. 2.75 mm. Description—Test of small size, subconoidal; -abactinal surface elevated; actinal surface flattened or concave. The ambulacral areas gradually widen from the apical disk to the ambitus whence they decrease in width to the peristome. They are composed of 6-7 plates surmounted by mammillated, noncrenulated, imperforate tubercles which increase in size from the apical system to the ambitus, decreasing again toward the peristome. The pores are round, uniserial, and oblique. *In the vicinity of Austin the Buda Limestone displays two distinct phases: a lower, chalky or marly, soft, white rock, and an upper, hard, yellowish to reddish rock. gI BupA LIMESTONE, WHITNEY 7 The interambulacral areas are widest at the apical disk, and gradually decrease in size to the peristome. They are com- posed of 6-7 plates ornamented with mammillated, noncrenulated, imperforate tubercles which increase in size to the ambitus, decreasing again toward the peristome. Besides these primary tubercles, there are granules distributed about their bases and over the surface of the plates, but the specimens studied are not well enough preserved to make out their distribution. The peristome is large, about .61 of the diameter of the test, decagonal and notched. The ambulacral and interambulacral lips are nearly equal and bilobate. The apical system is prominent and elevated above the general surface of the test. It consists of five genital and five ocular plates. The genital plates are variable in form, the anterior plates being larger than the posterior plates. They are polygonal in outline and bounded by six or seven sides. The oculars are likewise somewhat variable in form and size. They are bounded by three long and two short sides. The surface of each genital plate is ornamented with a central depression containing a mame- lon from which ridges radiate outward to the edges of the plate. The genital openings are at the edges of the plates where they join the corona. The periproct is subquadrangular and bordered by a raised collarette. The specimens collected range in size from 4.5 mm. to about 9 mm. in diameier. They are not well preserved except in the smaller sizes. They occur most frequently at the base of the upper division of the Buda Limestone, but they range to the top and occur at the contact with the Eagle Ford. None has appeared yet in the lower division of the Buda, nor in the other divisions of the Washita series. ; This species does not closely resemble any other described form of Goniopygus. Number of specimens: 16. Occurrence: Upper division of Buda Limestone, Austin, Texas. CENTRECHINIDA Genus Codiopsis, Agassiz Codiopsis texana, n. sp. Plate III, figures 1-4; Plate VI, figure 2 8 BULLETIN 26 — | 92 Dimenstons.—-Wiameter, 27.75 mm.; height, 21.5 mum: apical disk, about 11 mm.; peristome, 12 mm, Description.—Test of medium size, elevated, subpentagonal in outline, the ambulacral areas being at the angles, while the interambulacral areas form the sides. The superior surface is inflated or domed, whereas the inferior surface is abruptly rounded from the ambitus to the peristome. Oe The ambulacral areas are prominent, nearly straight, in- flated, and gradually tapering from a point at their junction with the oculars to the peristome where they are 5.5 mm. wide. Above the ambitus, there are only scattered tubercles or granules, but the surface is impressed by fine, longitudinal, undulating ridges giving it a shagreen appearance. Extending over about two-thirds of the distance from the peristome to the ambitus, there are two rows, of about seven each, of round, noncrenulate, imperforate, mammillated, alternating tubercles which decrease in size toward the peristome. Adradially of these, are two rows of small granules in each pore area. The row near the outer edge of the area has from three to eight granules, and is shorter than the more median row which extends nearly as far toward the ambitus as do the mammillated tubercles. Small granules en- circle the areolas, and, associated with these are almost micro- scopic crenulations or warts which form a delicate wreath about the base of each scrobicule. Above the ambitus, the pores are both round and oval. Each pair of pores is located in a depres- sion, surrounded by a peripodium, and arranged in arcs of three pairs to each ambulacral plate. Below the ambitus, the pore pairs increase in number till there are four rows at the peristome. In this region, the pores are more oblique than those above the ambitus, and emerge from the sides of a granule which separates the pores of each pair. Encircling each pore pair is a well de- veloped rim which is interrupted opposite the pore nearest the peristome. The interambulacral areas are large, depressed at the middle, and about three times as wide as the ambulacral areas. The surface above the ambitus is ornamented like that of the am- bulacral areas. Below the ambitus, there are four rows of round, 93 BupA LIMESTONE, WHITNEY 9 noncrenulate, mammillated, imperforate tubercles diverging from the peristome in two rows on either half of the areas. In the adradial rows there are from 7 to 8 tubercles, while in the medi- an rows there are from 4 to 5 tubercles. Each areola is bounded by a wreath of fine crenulations outside of which there is a circle of granules and warts. The peristome is small, roughly pentagonal, and without notches. The ambulacral lips are twice the width of the inter- ambulacral lips. The apical system is flush with the surface of the test, and is composed of five genital and five ocular plates so intercalated with the coronal plates that it is difficult to distinguish them. The right anterior genital plate is larger than the others and is spongy, containing the madreporite. The genital pores are large and toward the outer ends of the plates. The surfaces of the other plates appear to have been marked with longitudinal ridges like those of the corona, but weathering has almost oblit- erated them. The ocular plates are irregular in form. Some appear pentagonal in outline while others do not, possibly owing to their state of preservation. The oculars are perforated to- ward their outer ends. The periproct is roughly pentagonal. This species closely resembles Codiopsis doma Agassiz, but is not so elevated as that species and the sides are not so straight and the proportions are not the same. Comparison with a specimen from France indicates that the two are separate species, although very closely related. Number of specimens: 1. Occurrence: Top of lower division of Buda Limestone, Austin, Texas. Cottaldia rotula Clark Plate IV, figures 1-10; Plate V, figures 1-2 Dimensions.—Diameter, 24 mm.; height, 17.50 mm.; peris- tome, 3.5 mm. Description.—Test of small or medium size, depressed, circular in outline, melon shaped, the narrow ambulacral areas standing slightly above the interambulacral areas. 10 BULLETIN 26 04 _ The ambulacral areas are broadest at the ambitus, and their surfaces are ornamented with mammillated, crenulate, perforate tubercles arranged in transverse rows of two to three tubercles on each half of the ambulacrum, alternating with similar rows on the opposite half. This number may be reduced to one on each half ambulacrum in very small specimens. Around each couplet or triplet of tubercles there is a ring of granules. This ring does not seem entirely to close each areola, but shows only a tendency to do so between the tubercles. The pores are round and uniserial or moderately arched and separated by granules. Below the ambitus, they become crowded and irregular. The interambulacral areas are broad, being four or five times as wide as the ambulacral areas. The median portion is somewhat depressed, leaving the area in rounded, inflated halves. The surfaces of these areas are ornamented with alter- nating arched rows of mammillated, crenulate, perforated tuber- cles numbering from 3 to 11 on each half area. This number varies according to the age of the individual. In the small speci- mens, there appear to be only three tubercles, in each row, but in the larger ones the number increases to 10 or 11. This variabil- ity extends to the ambulacral areas as well, although the specimen figured in Plate IV, figure 7 shows a persistence in two tubercles to the row. This is a small individual considerably magnified in the figure. Encircling each areola is aring of granules. These, and the granules on the ambulacral area, are so arranged that they appear at first sight as a double row of granules between the rows of tubercles. Toward the apical system and the peris- tome, the number of tubercles is reduced, and in the revion of the peristome some crowding occurs. The peristome is relatively small, decagonal, and notched. The ambulacral and interambulacral lips are straight, but the latter are about one-half of the width of the former, measured from notch to notch. The apical system consists of five subtriangular genital plates and five V-shaped ocular plates so arranged that they form a 95 Bupa LIMESTONE, WHITNEY 11 wreath like system. The genital plates are pierced centrally by large genital pores. The periproct is large and subpentagonal. During its development this species undergoes considerable change in form and proportions as well as in ornamentation, as shown in the following table: Diam. Height Tubercies in Tubercles in No. of specimen mm. mm. each half Amb. each half lamb. I 4.62 2.50 i Bad 2 6.00 3.62 DAD a=3 3 8.00 4-75 2-2 4-5 4 10.00 6.50 22 6-6 5 12.00 2D) 6-7 6 15.00 10.25 O) XOG) 2) Ole 83 7-8 a 17.00 13.00 AOI BA (Ore 83 7-8 8 18.00 12.50 DUO a2) Oi. 8-9 9 24.00 17.50 aa OIE T (Measurements, across the area at the ambtitus ) Number of specimens: 11. Occurrence: Both divisions of the Buda Limestone, Austin and Manchaca, Texas. PHYMOSOMATIDA Genus Cyphosoma, Agassiz Cyphosoma volanum? Cragin Plate VI, figure 1 Cyphosome volanum Cragin, 1893, Geol. Survey Texas Fourth Annual Report, p. 147. Cyphosoma volanum Cragin, 1894, Colorado Coll. Studies, Vol. 4, pp. 45, 47- Cyphosoma volanum Hill, 1901, U. S. Geol. Survey Twenty-first Annual Report, pt. 7, p. 283. Cyphosoma volanum Clark, 1915, U. S. Geol. Survey Monograph, Vol. LIV, p. 61, Pl. X XI, figs. 2a-b, 3. Dimenstons.—Diameter, 15 mm.; height, 6 mm. Description—Test circular, depressed, slightly elevated above the ambitus, concave below it. - Ambulacral areas narrow, broadest at the ambitus, pointed at the poles; ornamented with two rows of alternating, mammil- ated, crenluate, imperforate tubercles which are largest in the ambital region. Areolas bordered by granules so arranged that they form polygons with the largest granules at their angles; 12 BULLETIN 26 96 number of plates, about 12. Pores variable and in undulating rows which double above the ambitus near the apical system. Interambulacral areas, double the width of the ambulacral at the ambitus; tubercles mammillated, crenulate, imperforate, and arranged in two rows on each half of the area. The areolas are bordered by granules forming polygons with extra large granules at the corners of the plates along the median and adra- dial lines. Peristome and apical system unknown. This is possibly the same as the species described by Cragin, but the specimen from the Buda Limestone is fragmentary and therefore unsatisfactory as a basis for determination and descrip- tion. : Number of specimens: 1. Occurrence: Upper division of the Buda Limestone, Austin, Texas. PYGASTERIADA Genus Holectypus, Desor Holectypus planatus? Roemer Plate VII, figures 1-5 Holectypus planatus Roemer, 1849, Texas, p. 393.- Holectypus planatus Roemer, 1852, Die Kreidebildungen von Texas, fo, GL | IgE. OS, ine, @, Holeciypus planatus Shumard, 1852, Exploration Red River of Louisiana Rept. p. 211. Holectypus planatus, Giebel, 1853, Naturwiss. Ver.in Halle Jahresb., P- 373- Holectypus planatus Conrad, 1857, U. S. and Mex. Boundary Surv. Report, Volk pt: 2, p. 145.) Ply i, dige 14. Holectypus planatus Desor, 1858, Synopsis des échinides fossiles, p. 174. : Holectypus planatus Gabb, 1859, Cat. Invert. Fossils Cretaceous, p. 18. Holectypus planaius Meek, 1864, Smithsonian Misc. Coll., Vol. 7 (177). pee Holectypus planatus Clark, 1891, Johns Hopkins Univ. Circ., Vol. 10, No. 87, p. 76. Holectypus planatus Clark, 1893, Johns Hopkins Univ. Circ., Vol. 12, No. 103, p. 51. Holectypus planatus Clark, 1893, U. S. Geol. Survey Bull. 97, pp. 51, 59. Pl. XXII, figs. 2a-1. 07 Bupa LIMESTONE, WHITNEY pane ge’ Holectypus planatus Cragin, 1893, Geol. Survey Texas Fourth Ann. Report Pp. 159, 160. Holectypus planatus Hill, 1901, U. S. Geol. Survey Twenty-first Ann. Report, pt. 7, p. 226. Holectypus planatus Clark, 1915, U. S. Geol. Survey, Monograph, Vol. LIV, pp. 65, 66, Pl. XXV, figs. 2a-f, 3a-c, 4, Pl. X XVI, figs. Ia-e. Dimensions.—Diameter, 14 mm.; height, 7.25 mm.; peris- tome, 4.5 mm.; apical system, 1.5 mm. Description. —Test small, subcircular; upper surface ele- vated, inflated; lower surface flattened or concave toward the peristome. The ambulacral areas are narrow, straight, widest at the ambi- tus, and somewhat lanceolate in form. There appear to be six rows of tubercles at the ambitus, but they decrease in number to- ward the peristome and apical disk. The pores are uniserial, small, and round. The interambulacral areas are a little more than twice as wide as the ambulacral areas. There are six rows of tubercles at the ambitus, but this number rapidly decreases toward the peristome and apical system. The apical disk is small and regular in outline. It consists of five genital plates perforated by large genital pores, and five ocular plates. The madreporite is large and occupies the central portion of the system. The peristome is a little less than one-third of the diameter of the test. It is slightly notched and decagonal in outline. The periproct is oval and extends from the peristome to the outer margin of the test. There are only two specimens athand and they are so poorly preserved that it is very difficult to make a satisfactory determina- tion or description of them. They probably belong to the species H. planatus, but there is some possibility that well preserved specimens would show that they do not. Number of specimens: 4. Occurrence: Buda Limestone, Austin, Texas. 4 BULLETIN 26 98 NUCLEOLITIDA Genus Echinobrissus, Breynius Echinobrissus angustatus Clark Plate VII, figures 6-9; Plate IX, figure 4 Echinobrissus angustatus Clark, 1915, U. S. Geol. Survey Monograph, Vol. LIV, p. 69, Plate XX VII, figs. 2a-c. Dimenstons.—Length, 15.5 mm.; width, 14 mm.; height, $8.5 mm. Description —Test small, subovate, rounded anteriorly, subquadrate and broadest posteriorly; upper surface elevated; apex anterior of the centre; lower surface concave. The ambulacral areas are subpetaloid on the upper surface, simple toward the ambitus, and form a rudimentary floscelle near the peristome. The posterior ambulacra are the longest. Between the pore zones the areas are ornamented with two alternating rows of mammillated, perforate tubercles whose areolas are deeply sunken and surrounded by closely set granules. The pores within the subpetaloid parts are arranged in pairs, the outer pores of which are oval whereas the inner ones are round. Here the pore pairs are separated by rows of fine granules, four to the row, within the pore zone itself. From the open ends of the subpetaloid parts the pores are fine and continue in diverging single rows to the ambitus. On the lower surface the pores again become paired and obliquely set in the floscelle. The interambulacral areas are broad and ornamented with numerous tubercles surrounded by deeply sunken areolas. The spaces between these areolas are covered with fine granules. The apical system is small. Four of the genital plates are pierced by large genital openings. The madreporite is large and centrally located. The peristome is subpentagonal, sunken and ornamented with several rows of fine, closely set granules. The periproct is oval, and situated at the anterior end of a deep groove. Although the material described by Clark was too poor to serve as a basis of a satisfactory description, it appears to be the 99 BupA LIMESTONE, WHITNEY 15 same as that described above. In fact, the measurements agree with the material here selected, but the species attains a much larger size, e.g., length, 21 mm.; width, 19 mm.; height, 9.5 mm. Number of specimens: 27. Occurrence: Upper division of the Buda Limestone, Austin, Texas. SPATANGIDA Genus Enallaster, d’Orbigny Enallaster traskt, n. sp. Plate VIII, figures 1-3 Dimensions.—Length, 40 mm.; width, 38 mm.; height, 20 mm. or more. Description —Test of medium size, suboval, widest part about midway of the length of the test; upper surface elevated, rising abruptly from the anterior margin, possibly highest in anterior, and gently sloping toward the posterior; anterior groove broad and forming a deep, wide notch in the anterior margin; posterior somewhat truncated; lower surface elevated in the region of the plastron, depressed about the peristome, giving rise to a keel-like form in the plastron. The unpaired ambulacrum is in the anterior groove The pores consist of alternating elongate and rounded pore pairs. In the specimens studied, this alternation is not regular, for there are two pairs of elongate pores followed by a pair of round pores; then five pairs of elongate pores followed by a pair of round ones, which are, in turn, followed by three elongate pore pairs before another pair of round pores occurs. The area is not well enough preserved to follow out the complete series. The anter- ior paired ambulacral areas are flexuous. The pore zones are composed of an anterior zone of rounded pores and a posterior zone of round pores in the internal row and elongate pores in the external row. Five pairs of the posterior zone correspond to about seven pairs of the anterior zone. The posterior ambulacral areas are much shorter than the others. Their pore zones consist of an anterior row of round pores separated from a posterior row of elongate pairs. The surface of the test is covered with tubercles having broad areolas bordered by fine granules. 16 BULLETIN 26 roo The peristome is small, transversely oval, and situated at the end of the first quarter of the length of the test. The periproct is not preserved in the specimens studied. The apical system is composed of four genital plates with large perforations, and five oculars. The right and left anterior genital plates are the largest, and approximate each other in size. The left anterior plate, however, unlike those of other species, narrows at its posterior end and extends backward throughout the entire apical system. This species resembles E. oblquatus Clark, but it is more rounded in ambital outline and not so high. The anterior slope is also much steeper than in that species. It is more rounded than E. mexicanus Cotteau, and not so broad posteriorly. I take pleasure in naming this species in honor of Mr. P. D. Trask, a student in Geology, whose interest and enthusiasm have led to several important discoveries concerning the fauna of the Buda Limestone. | Number of specimens: 2. Occurrence: Buda Limestone, at base of upper division, Shoal Creek, Austin, Texas. Enallaster bravoensis Bose Plate VI, figures 3-5 Enallaster bravoensis Bése, 1910, Instituto Geol. de Mexico, Boletin 25, . 168. ee Figs. 5-10; Lam. 42, figs. 2-12; Lam. 43, figs. 1-2, 6-7. Dimensions.—Length, 38 mm.; width, 34 mm.; height, 21 mm. Description.—Test of medium size, cordate, broadest anteri- orly, truncated posteriorly; upper surface arched, the greatest elevation being between the apical system and the posterior border; unpaired interambulacrum with a slight crest. Forward from the apical system the test slopes rapidly; posteriorly, it remains high and is truncated; lower surface flattened, depressed about the peristome, and somewhat elevated posteriorly. The anterior groove is broad and deep, commencing in the apical system and extending forward around the ambitus, which it IOI BupA LIMESTONE, WHITNEY 17 notches, to the peristome. The unpaired ambulacrum is situated in the anterior groove, and is wider than the other areas. Each pore zone is composed of eleven or more pairs of equal, rounded pores followed by a series of elongated, oblique pore pairs alternating with oval, oblique pores. This sequence continues for about two-thirds of the distance from the apical system to the ambitus. From this point the pores are in simple, oblique pairs to the peristome. The anterior paired ambulacra are not so long as the unpaired one, but they are nearly as wide. They are slightly flexuous, with the greatest curve at their posterior ends. The pores of their anterior zones are small, round, grouped in pairs, and vari- able in size. The posterior zone is much broader, and the pores of each pair are unequal, the internal ones being oval whereas the external pores are elongate. Seven pairs of the posterior zone correspond to about five pairs of the anterior zone. At the ends of the posterior zone, the pores become oval. The posterior ambulacral areas are short and relatively broad. The pore zones are unequal, the anterior being narrower than the posterior, and composed of pairs of rounded pores. The pores of the posterior zone are elongate, the inner pores being a little shorter than the outer ones. The tubercles are small, perforate, crenulate, and surrounded _ by broad areolas bordered by fine granules. The tubercles are largest in the interambulacral areas where they are associated with several fasciole-like bands of very fine granules. On the lower surface the tubercles are numerous, especially on the plastron. The peristome is small, oval, and situated very near the an- terior. The periproct is rounded and situated in the upper part of the posterior truncation. The apical system has four perforated genital plates, of which the two posterior are more separated than the anterior ones. Other details of the system are lacking-in the specimen studied. This species differs from FE. texanus Roemer, in its form and dimensions, the position of its highest point, and the ratio of 18 BULLETIN 26 102 the elongate pores to the rounded pores of the paired ambulacral areas. In FE. texanus this ratio is four rounded pores to six elongate ones, whereas in E. bravoensts it is five to seven. Number of specimens: 5. Occurrence: Buda Limestone, Austin, Round Rock, and Manchaca, Texas. Genus Hemuiaster, Desor Hemuzaster calvint Clark Plate VIII, figures 4-7; Plate IX, figures 1-3 Hemuaster calvini Clark, 1893, Johns Hopkins Univ. Cir., Vol. 12, No. 103, o 5s Hone calvinit Clark, 1893, U. S. Geol. Survey Bull. 97, pp. 90, 91, Pl. XLIX, figs. 2a-1. Hemuaster calvinit Bése, 1910, Instituto Geol. de Mexico Boletin 25, p. 175, Lam. 43, figs. 3-5, 8; Lam. 44, figs. 1-8, Lam. 45, figs. 1-3, 5. Hemiaster calvini Clark, 1915, U. S. Geol. Survey Monograph, Vol. LIV, p- 91, Pl. XLVII, figs. 2a-i. Dimensions.—Length, 31 mm.; width, 27.5 mm.; height, 22.00 mm. Description —Test of medium size, slightly polygonal in outline; upper surface elevated; lower surface flattened or slightly swollen in the region of the plastron; posterior truncated; am- bulacra moderately and about equally depressed on the upper surface. The unpaired ambulacrum is situated in a relatively broad and moderately deep groove beginning at the apex and extending forward to the ambitus which it notches slightly in passing around | to the peristome. The pore zones are composed of pairs of small, oval, or nearly rounded, obliquely set pores. The pores of each pair are separated by a granule. This arrangement prevails half the distance from the beginning of the ambulacrum to the ambitus. Beyond this the pores are not so conspicuous, and con- tinue to the peristome in widely separated pairs which are decidedly oblique. The paired anterior ambulacral areas are broad, lanceolate, and situated in deep grooves. The pore zones are broad at their centres, but constricted at their ends. The pores of the 103 BuDA LIMESTONE, WHITNEY 19 anterior and posterior zones are alike, and consist of pairs of small pores joined by line-like grooves. The space between the two zones is equal to the width of the zones. Beyond the peta- loid parts the pores are continued as distant pairs of small, rounded, obliquely set pores which diverge rapidly toward the ambitus, but converge below it toward the peristome. The posterior ambulacral areas are shorter than the others, and are situated in deep grooves. The pore zones are composed of pore pairs like those of the anterior areas. Beyond the peta- loid parts, the pores are distant and minute on the upper surface, but closer together and larger on the lower surface. The interambulacral areas are large and form crests about the apical system. Of these, the most prominent is the posterior crest. The lateral areas are divided into three distinct areas formed by two more or less prominent crests which extend from the apex to the ambitus. The surface of the test, with the excep- tion of the petaloid parts, is covered with irregularly scattered tubercles. The peristome is small, subpentagonal, and situated con- siderably anterior of the center. The periproct is oval, and located in the upper part of the posterior truncation. | The fasciole is broad and prominent about the ends of the petaloid parts. The apical system is of moderate size and located very slightly in advance of the center of the test. The genital pores are large, and so placed that the posterior ones are more separated than the anterior. The madreporite is large and in the center of the system. The oculars are pentagonal. Number of specimens: 6. Occurrence: Buda Limestone, lower division, Austin and Manchaca, Texas. 20 BULLETIN 26 IO4 EXPMANATION OF PLATE 1 (5) SS IEI TEU OLAIL ARVIN, ISPIe hau on deckuicoatc Ses eRe Lea e eee EE eae Page 4 (88) Fig’s 1, 5, 9.. Lateral surface of the test, enlarged. 6, 7. Lateral surface of the test. 2, 3. Upper surface of the test, enlarged. 8. Lower surface of the test, enlarged. 4. Ambulacral area, enlarged. No. 26, Pl. 1 Bull. Amer. Pal. id A oP A!) Ba) ik Vga a WY Bit ae BULLETIN 24 106 EXPLANATION OF PLATE 2 (16) GORTOPV TUS OIA CEMSTS Te 1S, eae eoe vs cose sees mae menccee nent scene Page 6 (90) Fig. 1. Upper surface of the test, X 8. 2. Lower surface of the test, X 8. 3. lateral surfrce of the test. 4. Lower surface of the test. 5, 6. lateral surface of the test, enlarged. 7. Ambulacral area, enlarged. 8. Interambulacral area, enlarged. PI. 16, Vol. 5 Bull. Amer. Pal. No. 26. Pl. 2 " 5 cm siay ves phan : (ett Rats ‘ Se? Peart Ne Mrs per rte 24 BULLETIN 26 108 EXPLANATION OF PVA ae 63 (72) COdIOPSISUTE RANG, Ai. SP ieee ROn tae eat eee eenenn eta Page 7 (91) Fig. 1. Upper surface of test. 2. Tateral surface of test. 3. Lateral surface of the test, <2. 4. Lower surface of the test, <2. 7 No. 26, Pl. 3 Bull. Amer. Pal. Pl. 17, Vol. 5 aly Bai ma ' on 26 BULLETIN 26 IIo EXPLANATION OF PLATE 4 (18) Cottaldia\rotulas Clare ae ins eee esas sane ane n aes Pageg (93) Fig. Upper surface of the test, X3. Lo Te 2 3 4 5. 6. i 8 g) Oo Upper surface of the test of adult. Lower surface of the test, <4. Lateral surface of the test, 2. Apical system, X9. Lateral surface of the test. Lateral surface of the test, X3.75. Interambulacral area, enlarged. Ambulacral area, enlarged. Laterel surface of the test, <7. 4 . 26. PI. No . Amer. Pal. Bull 5 PI. 18. Vol EN ctes ia aby Rone me vin Cr ean eae 28 BULLETIN 26 EXPMANATION OF PLATE 5 (IQ) GCOttQlata VOlula (Clarke ace e eee ee ee Fig. 1, (Above). Apical system, 18. 2, (Below). Lateral surface of the test, x 32. IIZ Pi. 19, Vol. 5 Bull. Amer. Pal. No. 26, Pl. 5 ri s Se See 39° BULLETIN 26 EXPLANATION OF PLATE 6 (20) Gy phosoma, volanuin 2, Cragin iiscssewenscoeccesanceerecaneaaaess Fig. 1. Lateral surface of the test. COATOPSIS LC LANAMAN (SP a ha-kstis secsebene senator enceeoenn sesetnens Fig. 2. Apical system, enlarged. SEGA IIA QEORIUA OSES VETS, | Sonne JosanoaddboonecoosHenocacossosceD Fig. 3. Lateral surface of the test. 4. Upper surface of the test. 5. Lower surface of the test. II4 Page 11 (95) 7 (91) 16 (100) PI.20 , Vol. 5 Bull. Amer. Pal. No. 26, PI. 6 Bit 1 ee jettles 32 BULLETIN 26 116 EXPLANATION OF PAVACE 7 (ay) LLOLECIYPUS PIAIOTUS) 2 ROCIICT AN Sen eee ene eee eee Page 12 (96) Fig. 1. Upper surface of the test, 3. 2. Lower surface of the test, <3. 3. Lateral surface of the test, <4. . 4. Lateral surface of the test. 5. Lower surface of the test of another specimen. LL CHAMOOTASSUS (CLO USLATIS) | Lats ete ee ne iene ee a 14 (98) Fig. 6. Lateral surface of the test, 2.75. 7. Upper surface of the test, 2. 8. Upper surface of the test, <3. g. Lower surface of the test, X3 Pl. 21, Vol. 5 Bull. Amer. Pal. No. 26, Ab 7 i Ae Ta oe, II BupA LIMESTONE, WHITNEY Plate 8 34 BULLETIN 26 118 EXPLANATION OF PLATE 8 (242) EMSA ALES ep Bale, Do, | Besceooonoaseur casco ow enc pce peouacaEcaecese: Page 15 (99) Fig. 1. Upper surface of the test. 2. Lower surface of the test. 3. Lateral surface of the test. VTCTNUOSLCH COLOLILIN Clan een na Nave anon ae eae eRe aera las Fig. 4. Lateral surface of the test, <3. 5. Lower surface of the test, <3. Upper surface of the test, <3. 6. 7. Lateral surface of the test, X1.3. Pl. 22. Vol. 5 Bull. Amer. Pal. No. 26, Pl. 8 frie enn BULLETIN 26 120 EXPLANATION OF PLATE 9 (23) TCIM TASLOTNEOLULIIE: NOL T cate Moet eee nian Ui snela tame en une Ba Page 18 (102) Fig. 1. Upper surface of the test, X1.3. 2. Lower surface of the test, X1.3. 3. Posterior surface of the test, X1.3. Echtinobrissus angustatus Clark. Fig. 4. Lower surface of the test, 7. Pl. 23, Vol. 5 Bull. Amer. Pal. No. 26, Pl. 9 Fes Vol. 5 BULLETINS OF AMERICAN PALEONTOLOGY No. 27 NEW MIOCENE FOSSILS BY AXEL OLSSON July 24, 1916 Connell Oniva\itinacawNe Me Weise wAL Harris Co. INTRODUCTION Since the publication of Bulletin 24 of this series, additional new Miocene species have been discovered and are described in this number. With the exception of two species of Vassas, name- ly WV. shaklefordensis and N. alumensis, the new shells are from the material collected by the two Ecphora trips of 1914 and 1915, and belong to the private collection of Professor G. D. Harris. The two /Vassas referred to above, are in the Paleontological Mu- seum of Cornell University. The second Ecphora trip had for its ultima Thule, the city of Newbern N. C. on the Neuse river. From there as a base, excur- sions were made by land by the members of the party to various fossiliferous localities. The interesting, type locality of the upper Miocene or the Duplin Formation, namely Natural Well, was visited by Karl P. Schmidt and the writer. By careful collect- ing a large amount of good material was obtained and several novelties discovered. Several not able localities were visited by water and of these, Rock Wharf, on the James river, north of Smithfield Va, deser- ves mention. This is one of Conrad’s original localities from which he described several species in his earlier papers. The beds belong to the Yorktown formation, and have an abundant and well-preserved fauna. Close to 300 species of mollusca are known from this locality. The last Ecphora trip, as well as the former, was conducted under the personal supervision of Professor G. D. Harris, to whose efforts, the success of the cruise was largely due. For the use and study of the material collected, the writer is indebted to Pro- fessor Harris. The willing aid and cooperation received from the other members of the party is also highly appreciated. Paleontological Laboratory, Cornell University, April 24, 1916 AXEL OLSSON 4 BULLETIN 27 I24 Mangilia magnoliana, n. sp., Pilate 2) Bigs rr Shell large, slender, with the body—whorl more than one- half the length of the shell; protoconch of about 3 whorls, the tst smooth, soon followed by curved riblets and later with the addition of 3-4 spirals; post-nuclear whorls 5; the spire-whorls are strongly angulated a little above the middle; riblets 12-14 straight, on the whorls of the spire extending from the lower suture upward and across the shoulder but soon disappearing, the appressed suture being bordered by a broad band free from transverse sculpturing; on the body-wnhorl, the spirals are fair- ly regular and finely and closely frosted by transverse lines; a- perture with a thin moderately expanded outer lip; canal some- what bent. Length 7.5, diameter 1.75 mm. The frosting of the spirals is fine and requires a lens to be seen. They are easily destroyed by weathering and erosion, but generally some portion of the shell surface will reveal them when examined. Duplin formation; Natural Well, N. C. ¢ Mangilia emissaria, nu. sp., Plate 2, Fig.6 Shell large, with the body-whorl more than one-half the total length of the shell; whorl angulated; nucleus —; post—nuclear whorls 5; suture distinct, not impressed; riblets about 8; on the whorls of the spire, the riblets are strongest below the angulated periphery, weaker above; spirals even, of narrow, flat bands, sim- iliar over all and are not frosted; canal long and slender, slightly bent; anal sinus not evident; aperture elongate with a thin out- er lip. Length ro, breadth 3, aperture 4.5, body-whorl 7mm. Characterized by its large size and few riblets. It appears to be arare species, the above description being based on a single imperfect specimen. Yorktown formation, Tar Ferry, N. C. I25 MIOCENE FOssILs, OLSSON On Mangilia smithfieldensis, n. sp., Plate 2, Fig. 12 Shell moderately large and fairly broad; whorls of the spire angulated; nucleus of about 3 unkeeled whorls, the rst smooth, the 2nd with curved riblets, the 3d in addition with 8 spirals in the interspaces between the riblets; post-nuclear whorls 4, angu- lated; suture not impressed; riblets 11 or 12, extending from sut- ure to suture, obsolete on the base and on the canal; spiral sculp- ture of fairly even, wavy, unfrosted spirals; canal straight; a- nal sinus not evident on any of the specimens examined; mouth broad and fairly long, with a thin outer lip. Length 8.5, breadth 3.5, aperture 4, body-whorl 5.5mm. This species may be known by its unkeeled nucleus, even unfrosted spirals and by the number of its ribs. Yorktown formation, James river, north of Smithfield Va. Drillia gastrophila, n. sp., Plate 1, Fig. 12 Shell heavy, of fair size with ribs and spirals, but without a pronounced contracted subsutural band; protoconch blunt of nearly 1% whorls, the first % turn smooth, followed by a turn with 3 strong spirals, of which the lowermost appears first; the change from the nuclear to the post-nuclear stage is abrupt; the post-nuclear whorls are about 7, the first with 11 small ribs; the first and the succeeding whorls of the spire have their ribs cut by 2 spiral bands; the last whorl carries 6 spirals which are even above but flatten out and merge with additional spirals below; the suture is bordered by a heavy raised spiral, completely fil- ling the subsutural zone at first, but latter only partially; body whorl with about 13 ribs; anal sinus shallow. Length 12, breadth 4, body-whorl 6, aperture 4mm. The species may be known by its straight sided whorls, its small contracted sutural zone with the strong spiral bordering the suture and by the characteristic sculpturing of its post—nu- clear whorls. Duplin formation, Natural Well, N. C. 6 BULLETIN 27 126 Drillia belloides, n. sp., Plate 1, Fig. & Shell pleurotomoid, belonging to the de/la group but larger and more slender than the typical della; protoconch like that of bella but with the ribbed stage much shortened and later with one more spiral ; post-nuclear whorls 6; ribs 11-13, typically about LI, not passing from suture to suture; subsutural band well-de- fined and concave, without ribs and covered at first with low, even spirals which later may become obsolete; the suture in young shells may be bordered by a raised line; the earlier post-nuclear whorls strongly angulated, below with 2 or 3 raised spiral bands; on the later whorls and on the body-whorl, the spirals increase and alternate with smaller ones; ribs on the body—whorl be— coming obsolete below; mouth with the outer lip somewhat thickened, and with a shallow anal sinus. Length 12, breadth 4.5, body-whorl 4.5, aperture 4 Sau. This species is distinguished from D. bella by its-more nu- merous and less prominent ribs. These ribs do not pass from suture to suture as they do in dela. The spirals are likewise heavier and more irregular, size larger, with the sutural zone well-defined. Yorktown formation, James river, above Smithfield Va. Drillia ecphore, n. sp., Plate 1, Fig. 3 Shell of a larger size than typical de//a to which it is rela- ted; protoconch blunt, of about 2 whorls, at first smooth, then with ribs and spirals; post-nuclear whorls about 7, with ribs and broad, raised, ribbon-like spirals; body-whorl with 8 ribs which pass well onto the contracted sutural band and also onto the base but do not quite reach the anterior canal; the contracted zone of the early whorls of the spire with 3 very low spirals; below the contracted zone, the ribs are crossed by 3 raised flat- topped spirals which later increase and become impressed; on the body-whorl the sutural band is covered with fine and fairly even spirals, generally about 7 in number; on the body-whori the spirals are at first even but alternate on the anterior canal ; 127 MIOCENE Fossi1s, OLSSON “I s suture bordered by a thickened band simulating a raised spiral; mouth short, with thickened outer lip and a deep anal notch. Length 14.5, breadth 5, body-whorl 7, aperture 4.5mm. This species differs from true de//a by its larger size and in the differences of its spirals which are low and more ribbon-like, the spirals on del/a being fine and well-raised. The species agrees with della in having the ribs extending up onto the contracted subsutural zone, differing in this character as well as others from Drilla belloides. Duplin formation, Natural Well, N. C. Drillia smithfieidensis, n. sp., Plate 1, Fig. 6 Shell elongate, with relatively small body-whorl and a well- marked though shallow sutural zone;’ nucleus blunt of about 2 whorls, the first % turn smooth, followed by a turn with 4 spirals, of which the 3d from above is the strongest and carinates the whorls; post-nuclear whorls 7,with short smooth-topped ribs and with the spirals in the form of broad flat ribbons; the 1st post- nuclear whorl has the contracted zone well-defined and sculptur- ed with 2 flat spiral bands, below with ribs and 3 spirals; the succeeding whorls show a gradual increase in the number of the spirals but these remain low and do not cross the ribs; body-— whorl with 11 or 12 ribs, present only on the middle of the whorl and leaving the base and canal sculptured only by the flat spirals; spirals on the body—whorl about 9, fairly even above but irregu- lar below; the 3d and 4th whorls have the edge of the suture thickened, becoming on the succeeding whorls a wide raised band ; mouth small, with a short canal, free from callus. Length 14.5, breadth 4.5, body-whorl 6.5, aperture 4.5mm. This species is readily distinguished by its elongate shape and short body-whorl. Yorktown formation; James river, north of Smithfield Va. 8 BULLETIN 27 128 Drillia me grawensis, n. sp., Plate 1, Fig. 13 Shell rather small, slender, sculptured with strong, widely spaced riblets and with strong or obsolete spirals; sutural zone flat and not prominent; nuclear whorls 3, the rst 2 smooth, the last transversely sculptured by 3 or 4 smooth riblets; post-nuc- lear whorls 5 or 6, the 1st with the transverse sculpture crossed by 5 or 6 impressed lines, giving rise to spiral bands; on the later whorls, the spirals tend to become obsolete, disappearing entirely from the sutural band and leave the rest of the spire- whorls with 3 or 4 wide spirals, these spirals become obsolete on the body-whorl but a few still persist on the base and on the canal; riblets on the body-whorl about 7, prominent and widely spaced, absent from the appressed, smooth, sutural band and from the base; mouth elongate, but not narrow, with the outer lip thin; columella slightly bent. Length 8, breadth 3.25mm. This species belongs with D. limatula and lunulata. The few heavy, widely-spaced riblets, the inconspicuous sutural band and the presence of spirals on the base are diagnostic. Duplin formation; Natural Well, N. C. Drillia magnoliana, n. sp., Plate 1, Fig’s Io, 11 Shell moderate in size, slender, solid, polished and with the whorls only slightly convex; the suture is bordered by a flat band, generally defined by a line or groove; whorls about 9; the body-whorl with about 15 or 16, oblique, straight riblets; these riblets commence just below the periphery and pass up— ward to the base of the sutural band, here they may become obsolete or continue across in a direction about 135° to their former; as a rule, the riblets on the sutural band are obsolete below, but strong next to the suture; base of the body-whorl without riblets; mouth subovate, with the outer lip thicken- I29 MIOCENE FOSSILS, OLSSON Ne) ed and provided with a fairly deep anal sinus; canal short, straight. Length 11, 15, breadth 4, 4.5, body-whorl 5.75, 7.5, aper- ture 4, 4.5mm. This species is related to D. pseudeburnea of the lower Mio- cene of Maryland and New Jersey. D. pseudeburnea has the rib- lets continuous over the base and the anterior canal is some- what longer. Duplin formation; Natural Well, N. C. Mitromorpha smithfieldensis, n. sp., Plate 2, Fig. 4 Shell small, fusiform, with sharp spirals and few obtuse ribs which are most prominent on the whorls of the spire; nucleus blunt of about 244 smooth whorls; 3 post-nuclear whorls, each somewhat overhanging the following; the rst, sculptured with 4 spirals, heaviest below and with a small one bordering the upper suture and separated from the 2nd by a wider interspace than usual; on the succeeding whorls of the spire, a 5th spiral may appear in the lower suture or just above; whorls angula- ted by the 3th spiral; body-whorl with 14 spirals, the 1st 5 are heavy and sharp, the rest gradually become weaker anter- -iorly; body-whorl with 8 ribs, present only on the middle; in addition a fine almost microscopic sculpture of incised transverse lines is present, showing best between the spirals; canal short, nearly straight; columella with about 2 obscure folds; outer lip simple. Length 5.5, breadth 2 mm. A well-marked species occurring most abundantly on the James river north of Smithfield, its type locality, but also known elsewhere. Marginella taylori, n. sp., Plate/2;\ Fig. 1 Shell large, subcylindrical, narrow; apex covered entirely by the last whorl but with no apical callus; aperture slightly 10 BULLETIN 27 130 longer than the length of the shell, narrow and with the sides nearly parallel below, but curving above towards the apex; out- er lip with a heavy varix, thickened near the middle, denticu- lated within, the denticles strongest anteriorly, fairly regular in the middle, absent from the posterior end; inner lip witha small callus at the posterior end, the remainder without but with 4 strong, subequal plications; these columellar plications are somewhat oblique, with the most posterior one situated at about the anterior third; surface of the shell weathered but probably smooth and polished when fresh. Length 47. breadth 22mm. This species belongs to the group of Margznellas containing M. antigua Redf of the Duplin Miocene and M. wilcoxtana Dall of the Pliocene. The above shell 1s much larger than either of these two, J7 antigua measures constantly about 31—34 mm, while wzlcoxiana is much smaller (16mm). There seems also to be a constant difference between faylost and antigua as re- vards the position of the columella plications, being situated more anteriorly in faylorz. Named for Bayard Taylor, a member of the second Ec- phora trip. Yorktown formation; Chocowinity, N. C. Marginella schmidti, n. sp., Plate 2, Fig. 13 Shell rather small, stout, polished, with an elevated spire and large body-whorl; the body-whorl is widest just above the middle; whorls 4; nucleus blunt; suture indistinct but bordered by a prominent ridge defined by a spiral line below ; growth lines quite evident, strongest and somewhat irregular on the area bordering the suture; aperture narrow, somewhat longer than the length of the body-whorl ; outer lip with a heavy varix, grooved posteriorly at its attachment to the body-whorl; outer lip denticulated within, the most posteriorly situated den- ticle large and heavy, the others smaller, subequal or obsolete ; 13r MIOCENE Fossiis, OLSSON ie columella with 4 subequal plications, the most posterior ones are nearly flat, straight, the others somewhat oblique; these pli- cations are surrounded by a thin wash of callus. Length 8, breadth 4, body-whorl 6 mm. The species may be distinguished from M7. denticulata by its banded suture and by its peculiar lip. The species is named for Karl P. Schmidt, a member of the 1st and 2nd Ecphora trips. Duplin formation; Natural Well, N. C. Mitra mauryi, n. sp., Plate 2, Fig’s 14, 15 Shell small, solid, coronate, with a coarse reticulate sculp- ture of straight ribs and spirals ; nucleus large, blunt, smooth ; post-nuclear whorls about 4, coronated above by means of a flat or somewhat concave band bordering the slightly appressed su- ture; the 1st post-nuclear whorl not coronated and with the ribs quite prominent ; the succeeding whorls of the spire have below the sutural band 6 nearly equal, raised spirals, separated from each other by wide interspaces, above with only 2 or 3 spirals; the spirals do not noticeably nodulate the ribs and show best on the intercostal interspaces ; the body-whorl with 16 spirals below the subsutural band; transverse sculpture of numerous straight ribs numbering on the body-whorl about 34 extending from suture to suture, well over the base and anter- ior canal; canal nearly straight with 3 strong folds on the col- umella, the posterior one being the largest; outer lip with 5 or more long, faint plicze situated a short ousteuice within. Length 4.5, breadth 2mm. This species is very distinct from the other small Miocene Mitras. May be told by the coronated character of the its whorls and strong, persistant sculpture. The species is fairly abundant on the James river, north of Smithfield, Va. A few specimens from Tar Ferry, N.C, Named for Dr. Carlotta J. Maury. 2 BULLETIN 27 132 Nassa smithiana, n. sp., Plate 1, Fig. 2 Shell small, solid, elongate, with heavy straight ribs and spiral bands; nuclear whorls 2—3, small, smooth; post-nuc- lear whorls flattened; ribs heavy and straight, occasionally one 1s developed which is more prominent than the others and may represent a resting stage; ribs on the body-whorl about 10; spiral sculpture consisting of bands, produced by incised lines cutting both the ribs and the interspaces, these spiral bands, on the body-whorl, number about 11 and are regular and large, except the two uppermost, which are smaller; whorls of the spire with 6 or 7 spiral bands; a deep smooth sulcus cuts into the base of the body-whorl ; suture distinct, bordered either by a smooth area or by small spirals; mouth small, rounded or ovate, angulated above; outer lip heavy, denticulate within, columella with a callus, denticulate ; siphonal fasciole strong. Length 14, breadth 6, body-whorl 7 mm. A very distinctive species, characterized by its elongate shape, heavy ribs and even spiral bands, The species is fairly abundant at Natural Well. Named for Ernest R. Smith, a member of the 1st and 2nd Ecphora trips. Duplin formation ; Natural Well, N. C. Nassa gastrophila, n. sp., Plate 1, Fig. 1 Shell large, with squarish whorls and oblique riblets cross- ed by few coarse spirals ; whorls 5, with slightly convex out- lines, angulated above near the suture ; body-whorl with 4 ob- lique, narrow riblets, separated by wide interspaces ;_ riblets ex- tending from the suture onto the base; the body-whorl with g raised, subequal, spiral bands crossing both the riblets and in- terspaces but do not noticeably nodulate the riblets; on the penultimate whorl there are 5 spirals; both the riblets and the spirals are crossed by fine lines which are oblique near the su- 133 MIoCENE Fossils, OLSSON 13 ture, more nearly parallel to the spirals elsewhere; a wide, shallow sulcus encircles the base of the body-whorl ; outer lip not heavy, with 6 long, internal lirations ; columella smooth, below with a heavy callus, somewhat toothed on the border of the anterior canal. Length 22, breadth 13 mm. The coarse spirals and few riblets are the main distinguish- ing characters of this species. Yorktown formation ; Chocowtntty, N. C. Nassa alumensis, n. sp., Plate 2, Fig. 5 Shell small, globose, solid; nucleus of 3 smooth whorls ; post-nuclear whorls 3, with few ribs and unequal spirals; the body-whorl with 10 ribs which are most prominent on the mid- dle, obsolete or absent on the base; the ribs are narrow with wide interspaces; spirals consisting of raised, unequal bands, numbering on the body-whorl about 18; on the penultimate whorl, there are 6 spirals, the 1st 2 bordering the suture are low, the next 5 are stronger, the 4th on the periphery, much the the heaviest ; on the base, the spirals closely spaced and even ; basal sulcus with spirals ; mouth ovate, angulated above, with the outer lip provided with 6 or 7 denticles within, inner lip smooth or with 1 denticle at its posterior end ; siphonal fasciole strong, bordered on the columellar side by a ridge. Fleight 6.5, breadth 4, body-whorl 4.25 mm. A small species, somewhat like WV. dzdentata Emmons, but with different spirals and mouth characters. Miocene,; Alum Bluff, Fla. Nassa consensoides, n. sp., Plate 2, Fig. 10 Shell small, with a large rounded body-whorl and a pointed spire ; rather numerous, low, straight ribs, which are crossed by unequal spiral bands; nucleus of 3 pointed whorls, smooth 14 BULLETIN 27 134 at first but with a few ribs on the later portion ; post-nuclear whorls 5; the body-whorl with 15 straight, low ribs; spiral sculpture of irregular bands; Ist post-nuclear, whorl with 6 e- qual spirals; the other spire-whorls have generally 5 heavy and 6 fine spirals; the body-whorl with about 21 spirals, strongest on the middle of the whorl; bordering the suture, there are 6 small, closely crowded spirals ; a small sulcus encircles the base, covered with spirals; mouth ovate, angulated above; outer lip thickened and denticulated within ; inner lip callused and with a few denticles below; siphonal fasciole strong. Length rr, breadth 6, body-whorl 6 mm. This species is readily recognized by its large body-whorl, pointed spire, and unequal, spiral bands. In general characters, the species approaches JV. consensa Ravenel but is sufficiently distinct for recognition and is the Miocene precursor of that species. Duplin formation; Natural Well, N. C. Nassa shacklefordensis, n. sp. Plate 2, Fig. 4 Shell small, coronate, sculptured with straight ribs and few, raised spirals; nucleus of 3 small, smooth whorls ; post-nuclear whorls 4, shouldered above and with the area bordering the su- ture with the ends of the ribs, with or without a spiral; on the spire-whorl. there are 3 or 4 narrow, raised spirals which cross both the riblets and the spaces between ;_ the riblets are some- what granulated by the spirals ; interspaces between the spirals very wide; on the body-whorl, there are 3 or 4 additional spi- rals on the base; body-whorl with 14 narrow, straight riblets with wide spaces between; mouth rounded, smooth or faintly lirate within ; canal short, straight. Length 6, breadth 3 mm. This species in most of its characters is a diminuative JV. trivittata. The resemblance is due to the coronate character of the whorl, straight ribs and sharp spirals. Typical WV. ¢rivzttata is not known from our east coast Miocene. Miocene ; Shakleford, Va. 135 MIOCENE FossIis, OLSSON 15 Scala dupliniana, n. sp., Plate 1, Fig. 14 Shell small, slender ; whorls 3+, regularly convex and with deep sutures between ; varices about 11, on the body-whorl be- ing low, flat and each provided with a small hook above ;. spiral sculpture between the varices of two kinds, a primary set of strong, raised spirals and a secondary intermediate spiral be- tween each two primaries ; on the whorls of the spire, the pri- mary spirals number about 10, smaller more irregular on the base of the body-whorl; in addition, the space between the pri- mary spirals is sculptured with equal, transverse, raised lines, of the same strength as the secondary, thereby producing a micro- scopic reticulation ; a narrow band bordering the suture, is with- out the spiral sculpture ; mouth round, thickened by the last varix. Length of specimen 5.5.mm ( 3 whorls ) Breadth 3 mm. Distinguished by its low flat varices, hooked above, by the spiral sculpture and microscopic reticulation of the spaces between the primary spirals. Duplin formation; Natural Well, N. C. Scala sheldoni, n. sp., Plate 1, Fig’s 9, 15 Shell small, slender, with 3 +, regularly convex whorls; varices 14, rather heavy, rounded and composed of several, flar- ing laminze; varices alternating in their position on the ad- joining whorls ; interspaces smooth or with obscure growth lines; mouth round, with a heavy outer lip. Length of broken specimen 5.5 mm. This well-marked species may be distinguished by its well-rounded whorls and heavy lamellated varices. On the ear- lier spire-whorls, the varices are somewhat irregular in their outlines and erose. This neat little species is named for Dr. Pearl Sheldon of 16 BULLETIN 27 136 the Department of Geology of Cornell University. Yorktown formation ; Kingsmill, Va, (type locality ) Grove Wharf, Va. Scalalineata Say, var. magnoliana, n. var., Plate 1, Fig. 5 Shell moderately large, elongate, with 6 + whorls; whorls rounded, with the suture distinct but not deep ; ‘varices small and irregular, numbering on the body-whorl about 13; on the base of the last whorl there is an elevated area well-defined by a ridge above ; intervarical spaces with irregular spiral bands, generally those situated on the periphery the strongest ; mouth rounded with a very thick varix at maturity. Length 14.5, breadth 6.5 mm. This shell may prove to be distinct from the recent S. /n- cata Say. The exceedingly heavy lip at maturity is most cha- racteristic. Duplin formation, Natural Well, N. C. CERITHIOPSIS Forbes and Hanley Heterocerithiopsis, n. subg. Protoconch of — whorls ; the last nuclear whorl is strong- ly angulated in the middle, with a resulting sharp periphery ; above the periphery with numerous, curved, smooth riblets, be- low, with two sets of riblets, which pass obliquely and intersect each other at nearly right angles, thereby producing rows of squarish pits; change tothe post-nuclear whorls abrupt. Type, Cerithiopsts smithfieldensts, n. sp. Cerithiopsis smithfieldensis, n. sp., Plate 1, Fig: 7 Shell small, elongate-conic, with slightly convex outlines ; protoconch of 1 + whorls (the tip broken on my specimens ) ; the last nuclear whorl strongly keeled ; above the peripheral keel with 20 curved, oblique riblets, below with oblique riblets 137 MIOCENE FOossILs, OLSSON 17 which cross each other at right angles ; later whorls about 7, the 1st 4 with only 2 tuberculated spirals, the remainder with 3; the last spiral is introduced above the other 2 and soon equals them in strength; riblets about 19, straight, extending from the suture across the spirals and their interspaces ; the spirals tuberculat ed by the riblets; suture distinct, excavated with a small, smooth spiral within; base markedly flattened, with 2 smooth spirals, the uppermost commencing at the suture, the 2nd, just below; the rest of the base is smooth but occasion- ally, an obscure spiral is present encircling the columella; can- al bent to the left. Length 4.25, breadth 7.50 mm. May be known by its peculiar nucleus, flattened base of last whorl and globose shape. Yorktown formation, James river, north of Smithfield, Va. Triphoris bartschi, n. sp., Plate 3, Fig. 7 Shell sinistral, elongate-conical, with nearly straight sides ; nucleus of about 2 whorls, smooth at first or somewhat spiral- ed, on the next turn with 3 strong, smooth, subequal spirals which later decrease to 2 by the disappearance of the lowermost one ; 9 post-nuclear whorls, with 3 or on the earlier whorls only 2 equal, moderately tuberculated spirals; riblets continuous a- cross the whorl but not onto the base ; the riblets, on the last whorl, number about 21 ; suture well-marked, with a fine smooth spiral; base flattened, and with 3 (and an indication of a ath) low, close, smooth spiral ; columella short, truncate and slightly bent both to the right and backwards; canal open ; mouth large, with the outer lip thin, oblique, expanded below ; anal sinus not evident. Length 7.5, breadth 7.75 mm. The spirally sculptured nucleus without riblets, in having the uppermost spiral of the later whorls the weakest and last to appear, will separate this species from its Miocene allies. Named for Dr. Paul Bartsch of the United States Nation- 18 BULLETIN 27 138 al Museum. Duplin formation, Natural Well, N. C. (type locality) Yorktown formation; James river, above Smithfield, Va. Triphoris dupliniana, n. sp., Plate 3, Fig. 8 Shell sinistral, elongate-conic, with nearly straight sides ; nuclear whorls 1+, the last turn with transverse ribbing and 2 peripheral carinz ; post-nuclear whorls 11, suture indistinct ; the 1st 5 whorls, with 2 subequal spirals, on the 6th whorl, an intermediate spiral makes its appearance and increases gradual- ly in strength ; on the body-whorl, the uppermost spiral is the strongest ; spirals tuberculated by 22 riblets which moreover ex- tend somewhat diminished across the interspiral spaces ; base sloping, with 3 smooth spirals; columella smooth; anterior ca- nal moderately long, closed or nearly so and bent both to the right and backwards ; mouth small, rounded ; outer lip oblique, with a deep anal notch bodering the suture. Length 5.75, breadth 1.75 mm. This species belongs to the group of 77zphoris, such as 7. melanura, which have only 2 spirals on the earlier post-nuclear whorls, later 3, with the last spiral coming in between the other 2. The open, anal sinus and bent, tubular anterior canal are the main diagnostic characters of this species. Duplin formation; Natural Well, N. C. Yorktown formation; James river, north of Smithfield, Va. Circulus schmidti, n. sp., Plate 3, Fig. 16 Shell small, depressed, with the whorls flattened above and below, and with 2 carinez bordering the upper and lower surfaces of the shell; whorls about 4, the 1st 2% turns are smooth and forms a small pointed spire distinctly elevated above the later flattened whorls ; the remaining whorls with raised spirals which commence coarse and alternating but soon become fine and re- gular ; base with a deep, wide umbilicus, showing the whorls 139 MIOCENE Fossiis, OLSSON 19 well up to the apex ; the baseis more strongly spirally sculptur- ed than the upper surface; the basal spirals are irregular and minutely decussated by the growth lines; whorls strongly cari- nated just above and below the periphery, and with the interme- diate surface strongly sculptured with fine spirals similiar to those found on the upper surface ; mouth oblique, rounded. Greater diameter 1.75, height .75 mm. Is readily determined by its possessing only 2 carinze and by its flattened upper and lower surface. Duplin formation , Natural Well, N. C. Calliostoma harrisianum, n. sp., Plate 2, Fig. 7 Shell of usual size, conic, with straight-sided whorls, and a narrow grooved periphery; base flattened or only slightly con- vex ; whorls 5, separated by deep, excavated sutures ; upper sur- face of whorls with 2 heavy, raised spirals, one bordering the su- ture, the other at the periphery ; the space between these 2 pri- mary spirals, carries 3 additional, smaller spirals ; the spirals may be granulated or smooth, and the peripheral carina is fre- quently double ; base flattened, imperforate, and strongly sculp- tured with 6 or 7 smoothish spirals which are wider than their interspaces ; mouth subovate, oblique. Greater diameter 7.5, height 6.5 mm. A well-marked species known at present only from King- mills. Related to C. virginicum. Yorktown formation , Kingmills, Va. Calliostoma suffolkense, n. sp., Plate 2, Fig’s 8, 9 Shell moderate in size, depressed, with flat upper whorls, a conic spire and angulated periphery ; base flattened, with a nar- row steep-sided umbilicus which is smooth within ; just above the periphery, a carina is present which is posterior to the suture on the later whorls of the spire, lacking from the earlier ; whorls 20 BULLETIN 27 I40 5, the rst small and smooth, the 2nd and 3d with from 3-5 strong spirals ; on the later whorls, the sculpture consists of fine, even, raised spirals, covering the entire upper surface and the peripher- al carina ; suture distinct, bordered posteriorly by the peripheral carina, anteriorly by a narrow, flat space which is defined by a 2nd lower carina; base flattened, or only slightly convex, cov- ered with fine spirals becoming coarser around the umbilcus ; mouth subovate. Greater diameter ro, height 8mm. This is a local species, known at present only from Suffcelk. The carina just above the periphery, the fine, even spirals and the open umbilicus are the distinctive characters. Yorktown formation ; Suffolk, Va. Caliiostoma (Eutrochus) shackelfordensis, Plate 2, Fig. 3 Shell of moderate size, depressed, with flat upper whorls, a conic spire and flattened base ; periphery with 2 prominent ca- rine, grooved between ; umbilicus small; whorls about 5, the 1st probably smooth, the znd and 3d with 3, 4 or s raised, sub- equal spirals ; on the later whorls, the spirals become low and irregular, and assume the appearance of impressed lines ; on the 4th whorl, these spiral lines arecrowded close to the surture and to the periphery, and with a smooth area between ; on the last whorl, the whole space is covered with fine, even spirals ; suture deep, excavated, the whorls coiling on the lower carina ; the su- ture is bordered in front by a raised line which is either smooth or beaded ; on the last whorl, this sutural line is made up of 3 spirals, similiar to those covering the rest of the surface of the whorls ; base flattened with impressed spirals, small and regular on the area bordering the periphery, few, coarse and groove- like around the umbilicus; mouth subovate. Greater diameter 9, height 7 mm. This species may be compared with C. cyclus Dall which it resembles in shape and general characters but differs from that species in its manner of coiling. In C. evelus, the sutures are I4i MIOCENE Fossils, OLSSON 21 closely appressed, the coiling being along the upper carina. In C. shacklefordensis, the coiling is along the lower carina, thereby producing a deep, excavated suture. Miocene ; Shackleford, Va. Teinostoma miocenica, n.sp., Plate 3, Fig,s 14, 15 Sheil small, solid, porcellanous ; whorls 3%, increasing ra- pidly in size, through their close coiling; suture appressed, of- ten indistinct ; nucleus of about 2 smooth whorls separated by a fairly deep suture ; post-nuclear whorls with fine but even spi- rals which are strongest on the area bordering the suture and on the base ; umbilical area covered with a thin callus, over which the spirals pass, and by a heavy thickening of the columellar wall; mouth nearly round, oblique, with a thin, outer lip. Greater diameter 2.25, lesser diameter 1.5, height 1.5 mm. This species may be known by its covered umbilicus, close coiling and spirally sculptured surface. 7. opsztelotus Dall, is similiar in its method of coiling but is only obsoletely striated and with an open umbilicus. Duplin formation; Natural Well, N. C. Teincsioma thompsoni, n. sp., Plate 3, Fig’s 3, 4 Shell very small, depressed, porcellanous, polished : whorls about 3, the earlier, covered to a variable extent by the closely appressed suture of the body-whorl; upper surface smooth, with indistinct growth lines; the periphery when viewed from above, shows fairly even radial groovings; base flattened; um- bilicus covered; the basal surface strongly sculptured by ra- dial grooves and growth lines; mouth oblique, subovate. Greater diameter 1.5, lesser diameter 1.00, height .75 mm. This species is related to 7. nanum Lea, a common and widespread Miocene shell. It differs from that species in its smaller size, more depressed shape, strongly sculptured base and 22 BULLETIN 27 142 periphery. Named for J. D. Thompson a member of the 2nd Ecphora trip. Duplin formation ; Natural Well, N. C. Pseudorotella bushi, n. sp., Plate 3, Fig’s 5, 6 Shell small, much depressed, polished, porcellanous ; whorls 3, enlarging uniformly ; suture rst deep and distinct, later be- coming appressed and bordered with an impressed band; sur- face smooth and shining, with irregular growth lines and general- ly with fairly regular groovings on the periphery, which may ex- tend well up onto the upper surface; base flattened, with the body-whorl large, and through the spreading of its columellar wall closing the umbilicus or leaving a small perforation ; the umbilical region is outlined by a small ridge or spiral; base strongly sculptured by close-set growth lines and with fairly even radial grooves, extending over the base and onto the pe- tiphery ; mouth round, oblique. Greater diameter 1.60, lesser diameter 1.20, height 6 mm. I am referring to the genus Pseudorotella Fischer, the Mio- cene species described as Zeznostoma calvertense Martin and 7. vortex Dall. T. vortex isa larger species and perfectly smooth except for the incremental growth lines. 7. calvertense of the lower Miocene is more closely allied to dushz, but our shell may be distinguished by the radially grooved periphery and more strongly sculptured base. This species is named for Dr. Katherine Bush for her work on the smaller gasteropods of the recent Atlantic fauna. Duplin formation, Natural Well, N. C. Ethalia alexanderi, n. sp., Blatezkio7Semnse2nnes Shell small, solid, porcellanous; spire low and rounded ; whorls 3, the rst turn small, the others much larger; suture distinct between the later whorls, indistinct between the earlier, 143 MIOCENE FossIis, OLSSON 23 generally with an impressed area in front ; surface smooth, pol- ished with fine incremental growth lines; mouth round, with a heavy callused columella, behind which is a small umbilical chink ; the umbilicus is faintly outlined by a small spiral line. Greater diameter 2.25, height 1.50 mm. This species is related to the recent shells, placed by Dall in the genus “thalia, namely reclusa, suppressa and solida, all of Dall, and in order to associate the Miocene species with those shells, Iam referring it to the genus Atala rather than to 7ezno- stoma. ‘These two genera have long been incorrectly used judg- ing from their respective types. Named for C. P. Alexander of the 2nd Ecphora trip. Duplin formation; Natural Well, N. C. Yorktown formation; James river, north of Smithfield, Va. Molleria harrisi, n.sp., Plate 3, Fig’s 18, 19 Shell very small, solid, naticoid in shape with a very small spire and rounded whorls ; whorls 2-3 with a moderately large nucleus; whorls solid, rounded, smooth above, with a well-marked suture ; the early whorls are always smooth and generally show but little weathering, the last frequently chalky and eroded; base with a narrow, deep umbilicus, angulated above and with 2, 3 or more spirals, mostly widely spaced above, closer below, descending spirally into the umbilicus ; umbilicus bordered by 15—2o0, radially incised lines, extending but a short distance out over the base from the umbilical angle ; last whorl rapid- ly descending ; mouth rounded, angulated at its attachment to the preceding whorl, internally with a well-marked opercu- late shelf. Greater diameter 1.00, height 7.00 mm. This appears to be a common and wide-spread species in the upper Miocene. MY. harrist and the following species, may be separated from JZ. minuscula of the lower Miocene by their sculp- tured bases. MM. harrisi has in addition to the spirals which may be either strong or weak, the constant presence of short radially 24 BULLETIN 27 T44 incised lines. This last named character will separate it from M. smithfieldensis. This interesting little shell is named for Professor G. D. Har- ris of the Department of Paleontology of Cornell University. Duplin formation, Natural Well, N. C. Yorktown formation; Tar Ferry, N. C. James river, north of Smithfield, Va. Molleria smithfieldensis, n. sp., Plate 3, Fig. 17 Shell very small, naticoid; spire prominent and elevated ; suture distinct and deep ; whorls about 3, solid, rounded and smooth above with spirals on the base; last whorl somewhat descending; upper surface smooth, with indistinct lines of growth ; base with a deep umbilicus, not angulated above and with strong spirals, the ist 3 (in and around the umbilicus} e- qual and separated by relatively wide interspaces, the others al- ternate in strength and rapidly become obsolete and dissapear towards the periphery ; the rst spiral is within the umbilicus, the 2nd and 3d, may beconsidered as outside ; the specimen shows 4 other alternating spirals and afew, very obscure ones nearer the periphery ; mouth rounded, somewhat angulated above and only slightly attached, internally showing the operculate shelf. Greater diameter 1.00, height .75 mm. A series of specimens show some variation in the strength and persistence of the basal spirals. Usually, they are as de- scribed above, but occasionally the spirals may continue onto the periphery and also on the upper surface. The species lacks the radial, incised, basal lines of 17. harrisz. Yorktown formation : James river, north of Smithjield, Va. Cyclostremelia magnoliana, n. sp., Plate 3, Fig’s 9, 10 Shell minute, consisting of about two whorls, planorboid in their coiling and enlarging but slowly ; suture deep and dis- tinct ; upper surface smooth, glossy, with very indistinct, radi- 45 MIocENE FossILs, OLSSON 25 al depressions parallel to the growth lines; base with a wide, funnel-shaped umbilicus, bordered by two, fairly strong, raised spirals, with fainter spirals nearer the periphery ; aperture near- ly quadrangular, markedly expanded and flattened below, above angulated near the parietal wall. Greatest diameter 1.5, height .7 mm. The species here described, agrees in its fundamental char- acters with C. humilis Bush, a recent Hatteras shell, and type of the genus Cyclostremella Bush. The most obvious differ- ences to be noted in the Miocene shell are its smooth, upper surface and more strongly striated base. Duplin formation; Natural Well, N. C. Psammobia gubernateria Glenn, var. daiti, n. var., Plate)2; vkis.)2 In the Miocene at Chocowinity, N., C. a form of Psammo- bia occurs quite plentifully but rarely in perfect condition. These shells are close to the Maryland Psammobza described by Glenn as guzoernatoria. They differ in a few characters, which on future reseach may prove constant enough for their specific separation. I have a fragment of a large Psammobia from Kingsmill Va, evidently the same as the North Carolina shell, thus indicating a fairly extensive range during Yorktown times. The North Carolina shell is larger and porportionally long- er, and with the beaks more centrally located ; the surface is smooth, with incremental growth lines which are deeper and ir- regular on the posterior slope; a small callus is frequently dev- eloped just in back of the beaks. Length 62, height 32 mm. Aligena pustulosa Dall, var. choptankensis, n. var., Plate 3, Fig. 1 Aligena pustulosa Glenn, Maryland Geol. Surv., p. 334 (not description, nor figure); not of Dall, 1898. Shell in shape like A. pustulosa Dall, but somewhat wider and of a general larger size ; surface posterior to the carina with 26 _ BULLETIN 27 146 strong, numerous, subequal, concentric lamellose lines; on this area, the pustules are lacking or if present very small and incon- spicuous ; anteriorly the concentric sculpture is less strong and quite irregular ; a radial sculpture is present, consisting of rais- ed irregular striz which may break up into numerous, small, nearly continuous pustules on approaching the basal margin ; other characters similiar to the type form. freight. 7.5, width 8 mm. Four specimens of this shell from Jones Wharf, Maryland, all show the above characters, differenting them from the typical A. pustulosa Dall. In their shape, strong carina and in other general features, the shells agree with their Oligocene precursor. Choptank formation ; Jones Wharf, Md. Lithophaga pectinicola, n. sp., Palte 3, Fig. 2 Shell elongate, subcylindrical, thin and fragile ; with the dorsal and ventral sides straight, and nearly parallel; beak nearly terminal; anterior end well rounded, posterior produc- ed and obtusely pointed ; external surface smooth with the erowth lines faint ; the surface is in addition quite strongly marked with regular resting stages, most evident on the post- erior slope. Length 12, height 4 mm. The type specimen was found in a large Pecten shell from Yorktown, Va. It isa typical Lithophaga and may be distin- guished by its cylindric and elongate shape, with ventral and dorsal sides nearly parallel. The posterior extremity is produced. Yorktown formation , Yorktown, Va. 147 MIOCENE FossiILs, OLSSON 27 CHANGE OF NAMES Drillia emmonsi, new name, proposed for Pleurotoma tubercu- lata Emmons 1858, Rept. N. C. Geol. Survey., p. 265, fig. 147., preoccupied by Pleurotoma tuberculata Pusch, 1837, Pol. Paleont. paras tava, ws tiga. b: Drillia cornelliana, new name, proposed for Pleurotoma ele- gans Emmons 1853, Rept. N. C. Geol. Survey, p. 265, fig. 146., preoccupied by Pleurvotoma elegans Defrance 1826, Dict. des sci. nat. 41, Pp. 395., also by Sacchi, 1836, Nat. Conch. foss. Gravi- BEB AC (D Alaly Uehye 3ty lite toy Fig. 1. 15 16. BULLETIN 27 148 EXPLANATION OF PLATE 1 (24) Page Nassa gastrophila, n. sp., 12° (132) Ventral view of the type specinien enlarged about 11% times. Nassa smithiana, n. sp., 12 (132) Dorsal view, enlarged 2% times. Drillia ecphore, n. sp., Ventral view, enlarged about 274 times. Mitromorpha smithfieldensis, n. sp., 9 (129) Type specimen enlarged 6 times. Scala lineata var. magnoliana, n. vat., 16 (136) Ventral view of type enlarged about 3 times. Drillia smithfieldensis, n. sp., 7 (127) Type specimen from Smithfield, enlarged 2.7 times. Cerithiopsis (Heterocerithiopsis) smithfieldensis,n. sp., 16 (136) Type specimen enlarged about 6 times. Drillia belloides, n. sp., 6 (126) Specimen from Smithfield, enlarged 3 times. Scala sheldoni, n. sp., 15 (135) Type specimen, enlarged about 6 times. Drillia magnoliana, n. sp,, 8 (128) Ventral view of type, enlarged 2% times. Drillia magnoliana, n. sp., 8 (128) Dorsal view of a larger specimen, enlarged 2 times, Drillia gastrophila, n. sp., 5 (125) Type specimen, enlarged about 3 times. Drillia mcgrawensis, n. sp., 8 (128) Ventral view of type, enlarged about 4 times. Scala dupliniana, n. sp., 15 (135) Ventral view of type, enlarged about 5 times. Scala sheldoni, n. sp., 15 (135) A smaller specimen, enlarged 6 times Drillia gastrophila, n. sp., 5 (125) A small specinien showing the strong carina bordering the suture. PI. 24. Vol. 5. Bull. Amer. Pal.. No. 27, Pl. 1 Fig. 1. 14. 15. BULLETIN 27 I50 EXPLANATION OF PLATE 2 (25) Marginella taylor, n. sp., 9 (129) Ventral view of type, slightly enlarged. Psammobia gubernatoria dalli, nu. var., 25 (145) Exterior view of right valve of type, natural size. Calliostoma shaklefordense, 1. sp., 20 (140) Ventral view of type, enlarged about 3 times. Nassa shaklefordensis, n. sp., 14 (134) Ventral view of type, enlarged about 4% times. Nassa alumensis, n. sp., 13 (133) Type, enlarged about 4 times. Mangilia emissaria, n. sp., 4 (124) Ventral view of type, enlarged about 4 times. Calliostoma harrisianum, n. sp., 19 (139) Type specimen from Kingsmill, Va, enlarged about 3 times. Calliostoma suffolkense, n. sp., 19 (139) Upper view, enlarged about 2% times. Calliostoma suffolkense, n. sp., 19 (139) Lower view, enlarged about 214 times. Nassa consensoides, nu. sp., 13, (133) Type specimen, enlarged about 2% times. Mangilia magnoltana, n. sp., . 4 (124) Specimen enlarged 4% times. Mangilia smtthfieldensis, un. sp., 5 (125) Specimen enlarged about 3 times. Marginella schmidti, n. sp., to (130) Specimen from Natural Well, enlarged 3 times. Mitra mauryt, n. sp., it (131) Type, enlarged 6 times. Mitra mauryt, n. sp., ir (131) Ventral view of a smaller specimen. PI. 25, Vol. 5, Bull. Amer. Pal., No. 27, Pl. 2 yn nen tate rd ID AY + : nome 32 He Bag. t. 225 fo. BULLETIN 27 EXPLANATION OF PLATE 3 (26) Aligena pustulosa choptankensts, n. vat., Specimen enlarged 3 times. Lithophaga pectintcola, 0. sp., Left valve of type, enlarged about 3 titmes. Tetnostoma thompsont, n. sp., Upper view, enlarged 12 times. Teinostoma thompson, n. sp., Lower view of same specimen. Pseudorotella busht, n. sp., Lower view of a specimen considerably enlarged. Pseudorotella busht, n. sp., Upper view of a specimen. Triphorts bartschi n. sp., Type specimen, enlarged 6 times. Triphoris duplinianus, n. sp., Specimen enlarged about 6% times. Cyelostremella magnoliana, u. sp., Basal view, enlarged about 15 times. Cyclostremella magnoltaua, 1. sp., Upper view of same specimens. Ethalia alexandert, u. sp., Upper view, enlarged Io times. Ethalia alexandert, n. sp., Ventral view, enlarged ro times. Ethalia alexander, n. sp., Basal view. Tetnostoma mtocenicum, Nn. sp., Upper view, enlarged 9 times. Teinostoma miocenicum, Nn. sp., Basal view. Circulus schmidt1, n. sp., Upper view of type, enlarged 12 times. Molleria snithfieldensts, n. sp., Basal view showing spirals, enlarged 23 times. Molleria harrist, n. sp., Ventral view, enlarged 20 times. Molleria harrist, n. sp., 152 we (IB) 18 (138) 24 (144) 24 (144) 22 (142) 23 (143) Basal view showing the spirals and radial lines, 22 times. Pi. 26, Vol. 5, Bull. Amer. Pal., No. 27, Pl. 3 Vol. 5 BU Ee ETINS OF AMERICAN PALEONTOLOGY No. 28 The Murfreesboro Stage of Our East Coast Miocene By AXEL OLSSON February 10, 1917 Harris Company Cornell University, Ithaca, N. Y. We Se 2s ane & N Des is ran y js Vang! i it ie Re i) THE MURFREESBORO STAGE OF OUR EAST COAST MIOCENE BY AXEL OLSSON CONTENTS INTRODUCTION POSITION AND LITHOLOGY AREAL DISTRIBUTION AND FORMER CORRELATION AGE DETERMINATION AND PALEONTOLOGY THE MARYLAND MIOCENE GENERAL CORRELATION INTRODUCTION Forming a no small part of the sedimentary deposits com- posing the northern half of our eastern Coastal Plain in New Jersey, Maryland, Virginia and North Carolina are the beds collectively known as the Miocene. They consist of clays, sands, marls or their mixtures, often with an abundant and inter- esting fauna, which has been the subject of study of several paleontologists since the time of Thomas Say. On the basis of faunal differences and stratigraphy, the series may be divided into stages; and, when these are studied, the former transgres- sions of the Miocene sea at the corresponding ages are deter- mined. The stages which may be recognized at present, are the following: Upper | Duplin stage, south of the Hatteras axis Upper Yorktown stage, north of the Hatteras axis Lower—Murfreesboro stage (ez) Middle—St. Mary’s stage Upper—Choptank stage Lower } Lower—Calvert stage 4 BULLETIN 28 156 It is the purpose of the present paper to name and charac- terize the new Miocene stage, occupying, as indicated above, a position in the lower Upper Miocene, that is, between the St. Mary’s and the Yorktown stages. To this group of beds the name, the Murfreesboro stage, is here proposed; and for its type exposures, the Miocene at Murfreesboro, N. C., and along the Meherrin river in the immediate vicinity of Murfreesboro, is se- lected, although a number of other places in North Carolina or Virginia would serve equally well. Throughout its areal distri- bution, the stage is uniform and in many respects represents the most typical expression of our east coast, or cold water Miocene to which the name Chesapeake is generally given. After its close, and during the Yorktown, changes towards the warmer Pliocene were inaugurated and new faunal elements introduced. POSITION AND LITHOLOGY The Murfreesboro stage consists of blue sandy clays, immedi- ately overlain by the yellow sands and light-colored marls of the Yorktown stage; and, owing to the general seaward dip of this region, its distribution is more inland and to the west of the lat- ter. Where the basal beds are exposed, they are seen to rest upon a number of different formations. At Petersburg, it is wpon the Cretaceous, or upon the crystallines or metamorphics of the Piedmont Plateau. When on the latter, the clay contains a considerable admixture of quartz and other crystalline fragments. The same condition obtains at Halifax,N.C. as it does at any lo- cality in the immediate vicinity of the crystallines. The beds rest upon Eocene at Ruffin’s and Evergreen, Virginia, and, in the northern part of their range, upon some member of the Miocene series. AREAL DISTRIBUTION AND FORMER CORRELATION The areal distribution of the Murfreesboro stage is from about central Virginia to central North Carolina. Known ex- posures in Virginia are found along the York river, and on the Pamunkey river as near West Point. The whole series of blue 157 MURFREESBORO STAGE OLSSON 5 clays found beneath the Yorktown stage on the James river belong to the Murfreesboro, as do the beds of similar lithology and stratigraphic position in northern and central North Caro- lina, as for examble at Halifax, Greenville, etc. This stage has in general been misinterpreted, and differ- ent parts correlated with different portions of the Miocene series. The presence of beds of diatomaceous earth, seemingly in a con- tinuous belt extending south from Maryland (as for example at Petersburg, Va.), and apparently closely associated with these beds, has led to their direct correlation with the similar deposits of the Calvert stage of Maryland. The evidence furnished by the more wide-spread and better known molluscan fauna is more trustworthy and should therefore be given more consideration than the presence of diatomaceous beds which might as well as not have been developed at different periods. Heilprin* in 1884, although recognizing an intimate relation of the Virginian fossils to each other and therefore indicating a nearly uniform age, still held to his anomalous view, earlier ex- pressed, of the continuation of his Marylandian or older Miocene south into Virginia and North Carolina, representing there the northern faunal horizon. He attributed this seeming dif- ference in characteristics to ‘‘imperfect observation or lack of ob- servation.’’ In 1904, Dallt compared the Maryland Miocene with other well-known localities. On the basis of the percent- age of recent species, these localities were arranged in a series to show their relative ages. In this scheme, the Petersburg beds (included now in the Murfreesboro stage) were considered as be- ing very old and beneath the Calvert or synchronous with it. For various reasons, final correlation by the percentage of the molluscan species which have survived to the present;day cannot be relied upon for exact and detailed work. This principle is of *Contributions to the Tertiary Geology and Paleontology of the United States, pp. 15, 16. +Maryland Geological Survey, Miocene volume, pp. cxlvii, exlviii. 6 BULLETIN 28 158 use in pioneer work, but should be replaced by the more accu- rate evidence furnished by the identity or similarity of faunas. In 1912, Clark and Miller* referred the beds at Peters- burg and those mentioned above on the Pamunkey river to the Calvert stage, and the remainder of the Murfreesboro stage as here defined to the St. Mary’s. It should not be understood that no Calvert or St. Mary’s is known in Virginia, as both are well represented in the northern or northeastern part of the state. In North Carolina, the stage includes all of the so-called St. Mary’s of the same workers.} AGE DETERMINATION AND PALBRONTOLOGY Stratigraphically, the stage occupies a position immediately below the Yorktown, apparently conformable with it and thus in a manner its upper age limit is not sharply defined. For more precise age determination, the fossil evidence must be considered, and in itself is conclusive. An analysis of the Murfreesboro fauna corroborates the stratigraphic evidence and indicates a much closer relationship with the Yorktown than with the St. Mary’s, or older beds. A considerably larger percentage of spe- cies are common to the Yorktown than to the Marylandian Mio- cene and the whole aspect of the fauna is of a more recent and advanced type. Several of the species of mollusks which have continued up from the lower and Middle Miocene show notice- able evolutionary changes, correlative with time, being either more. perfect or having assumed senile characteristics. An ex- ample which might be cited is Glycymerts subovatus, a species commencing first in the upper Oligocene, where it is small, con- vex and rounded in outline. It is similar but rare in the lower and Maryland Miocene, becomes large and very abundant in the Murfreesboro, generally losing its convex form and becoming de- pressed with senility, indicated by an increase in thickness of the *Virginia Geological Survey, Bull. 4. TNorth Carolina Geological and Economic Survey, vol. 3. ~I £59 MURFREESBORO STAGE—OLSSON shell, variability of form and obsolescence of its sculpture. The best and most widely known of our Miocene fossils is the peculiar and interesting gasteropod Acphora quadricostata. This species commences first in the Choptank, where it is repre- sented by a widely umbilicated form, generally separated as the variety umbzlicata of Wagner. In the St. Mary’s beds the spe- cies becomes typical, continues up into the Murfreesboro and Yorktown stages, where it is large and often abundant. It is pre-eminently a cold water or Chesapeake species, and during Murfreesboro time, as will subsequently be shown, followed the Chesapeake fauna south into South Carolina and into Florida. During the milder portion of the Upper Miocene, the species persisted in the cooler portions of its range, that is, in the Yorktown basin north of the then already defined Hatteras axis. It is lacking from the more southern, warmer, but synchronous Duplin beds. To the Murfreesboro stage belongs the distinction of having more species of Pectens than any other of our Miocene stages. Of the commoner Maryland species, all are represented except the Lower Miocene Pecten humphreysti and marylandicus. Pecien Jeffersonius and madisonius have continued up from the Lower and Middle Miocene. Several species are peculiar. The Upper Miocene Pecten eboreus, makes its first appearance, becomes com- mon and the dominant form in the Yorktown and the Duplin stages. Nearly confined as a fossil to the Murfreesboro and char- acteristic of it is Pecten clintontus, which in some localities is ex- tremely abundant. The species is very rare in younger beds, but evidently persisted to the present day, the recent P. magel- lanicus , by many being considered identical. The species which are grouped around P. vivginianus and decemnarius are nearly peculiar to the stage and are good index fossils. Another group of the monomyarian pelcypods, abundant in the Murfreesboro stage, are the oysters, represented by about two species, namely O. disparilis and sculpturata. ‘These two species are not known in Maryland, but are common and wide- 8 BULLETIN 28 160 spread in the Murfreesboro, Yorktown and Duplin stages. The mactroid Mulinia congesta is an upper Miocene species not recorded from the St. Mary’s or older beds. It is by far the commonest pelecypod of the Murfreesboro stage. Amongst the gastropods, the Maryland Busycons such as B. coronatum and fusiforme are entirely lacking, their place being taken by the larger and more modern species as B. maximum and zzezle. The Calliostomas, the smaller Nassas, Turritellas, all offer the same evidence. The whole fauna being distinctly of an up- per Miocene type. Since the Murfreesboro stage is older than the Yorktown, it is natural to expect that it should exhibit.closer relation with the St. Mary’s than is the case with the Yorktown. Several species of Isocardias are abundant in the Maryland Miocene but are rare or entirely absent in the Yorktown and Duplin stages. They are well represented in the Murfreesboro and often extremely abundant in certain clay beds. The geologic range of Melina maxillata is interesting, and the presence of this species associated with an upper Miocene fauna is the best criterion for the field identification of the Mur- freesboro stage. This species is very abundant in our Lower Miocene, especially in the Choptank. It continues through the St. Mary’s into the Murfreesboro and there sometimes equals, as far as number of specimens is concerned, its former import- ance in the Choptank. The species, so far as my knowledge goes, is entirely lacking from the Yorktown and Duplin stages. THe MaryviAnp MIocENnE Since the Murfreesboro stage has frequently been correlated directly with the St. Mary’s or older beds, a brief review of the more important paleontological characteristics of the Maryland Miocene may be of interest. In many respects, the Miocene of Maryland is a unit, its dif- ferent parts being more intimately related to each other than to 16I MURFREESBORO STAGE—OLSSON 9 outside Miocene. ‘This relation is illustrated beautifully amongst the gastropods where the whole aspect of several families of shells is markedly different between the two states. For example in the family 7urritide (Pleurotomide), the prevalent generic types in Maryland are 7urris and Surcula, while that of the Drillia- like forms are much less in evidence. In the Murfreesboro and the Yorktown, not a single species of the genera Zurrzs and Sur- cula are known, while Drzliza is very abundant both in species and individuals. The smaller Nassas of the upper Miocene have a distinctly modern appearance, very different from the Lower and Middle Miocene species. Another example might be selected from the Zerebvide. In the Maryland Miocene this family is well represented by the genus /Zastu/a and compara- tively few true Terebras. The genus Has/ula is entirely unknown in the Virginia and Carolinian Miocene. Its place is taken by a multitude of true Terebras, many of which are related to recent types. Further examples are unnecessary, but a number of others could be selected and would furnish much the same sort of evidence. : The highest stratigraphic stage of the Maryland Miocene is the St. Mary’s and therefore approaches most nearly the age of Murfreesboro. Its fauna is peculiar, easily identified and of rather limited distribution. It is well developed at its ty pe ex- posures along the St. Mary’s river, at Cove Point, and Langley’s Bluff, Md. In New Jersey, the stage has been recognized in several deep wells, as at Atlantic City, Wildwood, etc. In north- ern Virginia, beds of the same age occur along some of the north- ern rivers as on the Rapphannock. In Maryland, where the St. Mary’s stage is best known, it is characterized essentially by a gastropod fauna. At its type exposure, the following forms are very abundant: Acton ovoides, Flastula simplex, Turris communis, Raphitoma parva, Crassispira incilifera, Busycon coronatum, fusiforme, Buccinofusus parilts, Nassa peralta, Turritella plebeta, Calliostoma humile. Amongst the pelecypods, the more conspicuous are Spisula subponderosa and Ke) BULLETIN 28 162 Arca idonea. Most of these species are peculiar to the St. Mary’s, but a few have continued up from the Choptank and the Calvert, or are there represented by closely related forms. None of these species are known, except in a modified form in higher beds _ GENERAL CORRELATION In Virginia and North Carolina, the Murfreesboro stage is distinguished by having an Upper Miocene fauna associated with a small percentage of species which have continued up from the Lower Miocene, and a few which are peculiar, and therefore con- stitute index fossils. By means of these index fossils, and the general evidence furnished by the whole fauna, correlation with more distant Miocene deposits becomes possible. For many years Tertiary beds have been known on Gay Head, Martha’s Vineyard, Massachusetts, and a part of this group belongs to the Miocene series. Dall*, in 1894, visited the locality for the purpose of studying the fauna. He listed about thirty-three species of fossils of which twenty-two are mollusks. Significant species, and correlating with more southern Miocene, are Cardium virginianum, an index fossil of the Murfreesboro stage, and Glycymeris reflexa of the Murfreesboro and Yorktown. The beds therefore seem to be of Murfreesboro age, a conclusion which Dall himself practically reached. His statement is as fol- lows: ‘‘As regards correlation with the divisions of the Southern Miocene it may be said 1: that the Gay Head Miocene is Chesa- peake and not older; and 2, that it belongs in all probability to the upper part of the Chesapeake, certainly not lower than the St. Mary’s fauna, and probably between that and the Yorktown bedsii7 In Florida, Miocene deposits are exposed in a narrow belt extending across the northern part of the state. During their deposition, a strait existed which connected the Atlantic with the Gulf and severed Florida from the mainland. *American Journal of Science, vol. 48, pp. 296-300. 163 MURFREESBORO STAGE—OLSSON II At Alum Bluff, Miocene beds are exposed overlying uncom- formably the Upper Oligocene. The contained fauna is strictly a southward extension of the Chesapeake and not of the nearer and warmer Duplin Miocere. Lithologically, the beds consist of blue or gray sands and are characterized by an abundant mol- luscan fauna of which the following species are noteworthy and of value for correlation. Mulina congesta is the commonest fossil (range Murfreesboro- Pliocene), Ostrea disparilis (Murfreesboro- Yorktown and Duplin), Cardium virginianum (Murfreesboro), Pecten eboreus (Murfrees- boro-Pliocene), Lcphora quadricostata (St. Mary’s-Yorktown), Busycon maximum (Murfreesboro-Pliocene). These beds there- fore correlate very well with the Murfreesboro of Virginia and North Carolina. In South Carolina, Miocene is known to occur at several lo- calities and available evidence indicates that two horizons or stages are represented. Since the appearance in 1857 of Tuomey and Holmes work on the Miocene and Pliocene faunas of that state, comparatively little has been done, so that the distribution of the Miocene faunas is known only ina general way. Inan eatlier paragraph the geological range and distribution of Ec- phora quadricostata was considered and shown to be a cold water or Chesapeake species and lacking from the warmer Duplin beds. Its range is St. Mary’s to the Yorktown. In South Carolina, E:cphora quadricostata is recorded by Tuomey and Holmes from the Miocene of the Pee Dee river. The age is therefore either St. Mary’s or Murfreesboro, more probably the latter. ae Sane pep ve hd ney ie. ie ee SUF vguvns puv ovpyy ap opwi12) DIR ARLIN'S OF AMERICAN PALEONTOLOGY Nom 5 INNGUM PHBE IR 2S Santo Domingo Type Sections and Fossils By CARLOTTA JOAQUINA MAURY ASE March-April, 1917 Harris Company Cornell University, Ithaca, N. Y< Rare ne SANTO DOMINGO TYPE SECTIONS AND FOSSILS PAR ae MOmU Use SOMMARVAOP GON LENS. TEXT PAGE LEN RO DW CATON Sonos cn Me ec Neee re eReader Sete 1-2 SIGH AGE OF MDE EXPE DITT ON eate soaeeee ee eeaie 5 -1a2 Neen re 3-10 Personnel, 3; Route, 3. IVI TTS WANS serene oisls cola el ole egos sonnet ee Neola eee sinere relate ee 11-251 Gastropoda 2025.0 eater Pe ean Sone aM SEamnopodar sss. h.n es ee ee een a ety At sae ... 158-160 Pelecy mod aug a aces el nec naa OMe s eal h suena 161-235 EO XG EI AVNT ACTION OH EST AUIS ot trea ty ets seats act eo srl peclee 236-251 ILLUSTRATIONS FRONTISPIECE (Pl. 1): Cercado de Mao and Samba Hills. PLATE 2 (above): Plain of Las Caobas near Sabaneta....... 6 2 (below): Crystalline outerop Arroyo Savana Larga 6 SHIM NY GEMS ANG. 18a 21 SPD NIONN ae undoes naonine «odeuepedcene daca IO PUR SEs- 201 eSanto, Womincostossilisivell sia oo 2520 Monte Cris’ EL MORRO Monte Cristi \ en 18), Zas Lomas Los Aguas eS (3) Las Matas, + 2) ™M acabon ‘ ; & S 19 \(7) ae, ‘ N, Bae \ Ne ‘, Guayubincito(17) Sr. 4) Escalantes ; \ — a \ \ BULLETINS OF AMERICAN PALEONTOLOGY, Vol. 5, No. 2 © Ruins of Isabella SKETCEeMArP OF EW TION | MAy-JUNE 1916 ----- Outward Route ------ Return Route Scale of Miles S, Geological Section (See Part IT) (6) As (8) Cerro Gordo ‘Martin , Garcia Cana 10) oAMBA De 4 Rompino AS (Desiderio Arias with a large ve band entrenches himself at S Looting and burning. All Am cans flee.) a '{ Potrero progress ( 15 Impossible.) \ \ Santiage Angostura de Yaqui 9 Rio Ne Vaje | SIN @E DOM lING Gal NG SECO NS A Ne Fess ils PART I MI OIE S@yx INTRODUCTION The Expedition to Santo Domingo and the results embodied in this memoir were carried on under the auspices of the Sarah Berliner Foundation. This generous gift for the furtherance of women’s work in science was made by Mr. Emile Berliner of Washington, in memory of his mother, Mrs. Sarah Berliner, a woman of strikingly strong and noble personality. A grant from this fund has made possible the resumption of paleontological work in Santo Domingo after an interval of more than forty years. Additional financial assistance was received through contri- butions from the Veatch Fund for paleontological research. This rendered it possible to send an extra assistant and thus to carry on the field operations with far greater safety and efficiency. The object of the expedition was to make careful zonal col- lections of fossils at the various sections visited and to correlate these sections with one another. With these determinations made, a much needed light would be thrown on the general se- quence of Tertiary formations in the Western Hemisphere. In addition to more than three hundred species of fossil Mollusca with exact localities, illustrated by photographs and sections, the collections secured by this Expedition included fossil Crustacea, Echinoderms, Corals, Bryozoa, Foraminifera, and plant remains; also several hundred species of recent land and marine Molluscs fromTurks Island and Santo Domingo; some inter- 2 BULLETIN 29 166 esting living river crabs and other Crustaceans, and various Rep- tiles, including a new species of snake and some curious lizards. The fossil Crustacea, Echinoids, Corals, Bryozoa, and Fora- minifera were sent to Dr. Vaughan to be submitted for identifi- cation to experts in the different groups. He himself very kindly undertook the corals, Miss Rathbun the Crustacea, Dr. Jackson the Echinoids, Messrs. Bassler and Canu the Bryozoa, and Dr. Cushman the Foraminifera. In return for this kindness the ma- terial was loaned to the United States Geological Survey for in- corporation in various forthcoming reports. Thus it will be seen that the Expedition has contributed new and interesting material for many lines of research. Our collection of Molluscs was supplemented by a loan of unnamed Santo Domingo specimens from the American Museum. This gave an additional locality for correlation. Of greatest value in making the identifications was the Gabb collection of the Paleontological Museum, Cornell University, which included a large number of metatypes. The order followed in this memoir is that in which the work was actually done. The material was collected and very critic- ally examined and classified. In accordance with this, Part I will be devoted to Mollusca, Part Il to Stratigraphic Deductions made from the study of the various classes of organic remains. The author is grateful to Dr. Dall for his aid in certain per- plexing identifications; to Dr. Vaughan for his personal interest in the corals and for the distribution for study of the various groups of fossils among his colleagues and assistants; to Dr. Reeds for the loan of the American Museum collection; to Pro- fessor Berry for identifying the_plants; and to Professor Harris, who has been a never failing inspiration and mainstay. For greatly facilitating the progress of the Expedition the writer is much indebted to the kindness of Mr. Arthur Sewall, Hon. W. A. Maury, Professor Grabau, and Ambassador W. W. Russell. 167 DoMINICAN Fossi_s-—-MAuURY 3 SIGE ICR QR! Wri (2 ie Sa DIN Personnel.—The expedition consisted of the writer, Mr. Karl Paterson Schmidt of the American Museum, and Mr. Axel Olsson, Instructor at Cornell University. Mr. Schmidt and Mr., Olsson had the great advantage of having been trained in geological field work by Professor Gilbert D. Harris, having spent three summers in exploring and collecting on rivers of the Southern States, flowing through Tertiary formations not unlike those which were to be explored in Santo Domingo. All the heavy and arduous work of collecting was done by Mr. Schmidt and Mr. Olsson. This involved wading up rivers, carrying heavy packs of fossils, sleeping in the roughest shanties, and undergoing the greatest discomforts, some not unmixed with danger to health and life, but none causing them to falter in the slightest degree. Highest praise and sincerest thanks are offered to Mr. Schmidt and Mr. Olsson for their splendid work in se- curing the fossils and sections upon which the results of this work are based. Route.—The expedition left Monte Cristion May oth, 1916, af- ter one day’s study on the Morro. It was not possible to pro- ceed through Guayubin on the main road, as that town was rebel. So the party crossed the Yaqui River directly south of Monte Cristi on the ferry and went to Las Aguas (see sketch map, I), thence to a region called Macabon (2 on sketch map), which lies in a very flat area. So far the trip had been over the Yaqui flood plain, consisting of alluvial deposits cut by the meandering, abandoned channels of tributary streams. Heavy rain at Macabon caused a delay of twenty-four hours, as the water lay six to’eight inches deep on the flat plain. . From Macabon the party proceeded to Las Matas (3-0n sketch map). The land here becomes rolling and is strewn with reddish gravels. Riding on to Escalantes (4 on map) Ostrea and 4 BULLETIN 29 168 casts of Pectunculus were found in the roadway near a small creek. The second night was spent at Escalantes and five hours ride the next day took the party to Sabaneta. All the way from Las Matas to Sabaneta is over the reddish gravels. On approaching Sabaneta (5 on map) one sees the level, grassy savannahs. These, like those of Venezuela, have never been cleared and are natural meadows. Near by the grass is seen to be short and poor, although in the distance the plains look very green. The savannahs are diversified by little knolls rising from them, covered with bushes. These knolls have szper- jicially the appearance of morainal hills. The savannahs are of different levels, in some cases this difference being approximately fifty feet. Those of the savannahs which are close to streams are deeply cut by dry arroyos and are left often standing as blocks. The summits are grassy, but the slopes covered with bushes. The town of Sabaneta is built on one of the large sa- vannahs on the banks of the Rio Yaguajal and its altitude is ap- proximately 325 feet. A day and a half were spent studying the bluffs along the river at Sabaneta, but they were found to be unfossiliferous. A search was then undertaken to find Rompino, one of Hen- eken’s localities where more than sixty years ago he had collect- ed fossils. This proved a difficult and very unsatisfactory quest, as the present Rompino is a regional name. These regions are quite common, their limits are indefinite, and their existence of- ten indicated only by a pulperia (little village store) or a shack. On crossing the end of the Samba Hills on the road from Guay- ubin to Sabaneta a fossiliferous cut was observed in the roadside, the fossils in place being of the Avca ponderosa type, while fur- ther along the road the large Arca patricia occurred loose, not zm Situ. Martin Garcia (6 on the map) is not well placed on Gabb’s map, as it really lies to the Worth of the Sambas. However, it is also aregion. Beyond Martin Garcia on the main road just north of the pulperta forming the center of Martin Garcia, the 169 DOMINICAN FossiILs—MAuRY 5 party crossed a small hill capped with soft limestone and found there casts of the large Spondylus americanus, which proved a good index fossil in stratigraphic work. Casts of Arca, Venus and corals were also found. Rompina was not yet found and the party was lost and obliged to stop for the night at Ranchadero (7 on the map) Here they slept in a gallinero (hen house). The host assigned this to the guests, first gravely untethering his game rooster and carrying it to thestore. The party slept in hammocks, but were much worried about the horses, fearing /advones (bandits) might steal them in the night. Ranchadero is on the Mao to Guayu- bin road where it passes the edge of the Rio Yaqui flood plain. The barometric reading was 170 feet altitude at Ranchedera. Passing through Cerro Gordo (8 on map), the party met with rebels and malo gente, who hotly disputed whether it would not be well to begin the killing of the Americans with these,— ‘‘Bueno para empezar con estos a matar los Americanos!’ The next stop was Cana (9 on map) on Rio Cana on the Mao-Guayubin road. Above the ford at Cana a fine fossiliferous bed of Serpulorbis papulosa was found. The party camped that night ina tent near the Rompino river, a tributary of the Cana. There were a few houses there and the natives were brist- ling with knives. The next day an attempt was made to follow up the Cana river, but the party was misled by the cow-paths, which are exactly like the trails. But the following day a de- serted shack was found back of the river. This shack Lalo (the guide) pronounced to be the true Rompino (Rompino verdadetro) (10 on map). Finding nothing there, Los Quemados was made the next objective point. Since Los Quemados is on the south side, the party had to cross the Sambas. First a trail was followed, then an old ma- guina (machine) road, formerly used in hauling gold-washing machinery across the Sambas to the old mines. This road is wide, still in fair condition, with wheels and pieces of iron scat- tered along. It le#up and up to 870 feet altitude on its summit 6 BULLETIN 29 170 where it passes over the crest of the Sambas. As the road lay in a low pass, the maximum height of the Sambas was estimated at 1000 feet. This range of hills viewed from the south near Sabaneta appears as a straight, little-broken ridge, cut into by the Rio Cana. The hills are capped with rather hard limestone. They are covered with a heavy growth of timber, — a hard wood forest, the most striking tree being the a/macigo, with very yel- low scaly bark. On beginning the descent down the Sambas, the forest opens up and discloses a magnificent view of the Las Caobas (mahog- any) plain, and behind it the frowning Cordillera, always capped with ranks of cumuli. The mountains also stand in ranks, with Pico Gallo, 8000 feet high, towering in their midst. The higher peaks disappear into the clouds which seem a continuation of the mountains. The Las Caobas plain is covered with masses of apartzllo (bunch) grass. This grows as tall as four feet and bears spikes of reddish flowers which give the entire plain a reddish appear- ance. The plain is rolling with a general dip towards the Sam- bas, that is to the north. Among the bunch grassis the /aba- guela, a scraggly, crooked shrub, used for making canes when well grown, as it is very tough. Coming down the road the party branched off into an ar- royo on the west, where a yellow fossiliferous clay with Pectens was found at an altitude of 540 feet. There is no village of Las Caobas, but this region is marked by the pulperta (country store, indicated on the sketch map as 11). Three or four miles east of this pulperia of Las Caobas the Sambas break up into more than one range towards the Rio Gurabo. Even further west they are given local names, as Cerros de Martin Garcia, de Cerro Gordo, etc. Not far from Las Caobas the party ob- served a small amphitheater superficially resembling a cirque, a couple of hundred feet deep, the slopes wooded except where cleared for planting bananas, and the bottom well culti- vated. The whole effect was that of a great arm chair. A 171 DOMINICAN FossILS—MAuRY 7 small arroyo runs from it into the Rio Gurabo. The amphithe- ater is no doubt a singular form resulting from erosion. The Gurabo was then forded three times to observe the striking bluffs of blue clay about 100 feet high, with a charac- teristic concave curve. ‘These are Gabb’s ‘“‘blue shales’’ really a hard clay not sufficiently consolidated for shales, nor are they laminated. They contain wonderfully preserved gastropods and more fragile pelecypods, among them the large Spondylus. Here and elsewhere in the Yaqui Valley this proved a very character- istic fossil. Three days and a half were spent in this region on the east bank of the Gurabo collecting. The best accomodations obtain- able at night were native cots in the combined chicken coop and store house at the pulperia of Los Quemados (12 on sketch map). Trips up and down the river on foot were made, going as far as possible. It was impossible to ride, as there are no trails for horses. Above Los Quemados the river cuts through limestone al- ternating with blue clays. The limestone tumbles in great blocks into the river and down its banks, and one has to crawl under or over these great blocks. The Gurabo river here is twenty-five to thirty-five feet wide. Its bed is of clay with gravels and bowlders from the Cordillera, the bowlders being of both metamorphic and igneous rocks. The sides are precipious, and 80 to 100 feet high. They are usually more sloping where the limestone formation is present except where it forms a pro- tective cap. The plain of the river bottom is usually cultivated and is up to forty rods wide. One of the very characteristic trees on the banks is the A/ara, which is magnolia-like. Abound- ing in the trees and bushes of the banks is a green snake, the Cu- lebra verde ( Uromacer catesbyz), which is peculiar to the island. This species is used for the Voodoo worship in Haiti. The party left Los Quemados for Mao, by good fortune vza Cercado (13 on the map and shown on frontispiece). This is one of Heneken’s localities and it gave us a splendid yield of fos- 8 BULLETIN 29 172 sils. Six days were spent collecting at Cercado, the party stop- ping at the house of Senor Jose Fraden, a very intelligent and kindly man. He said there were many badly disposed people (mucho malo gente) in the neighborhood and therefore was so good as to send the young man of the house with the party and with the guide as a protection. Three fossiliferous cliffs were found above Cercado and one or two below. Large collections were made from these bluffs. This occupied about a week’s time. A trip was also made to the Rio Amina as far as Hato Viejo on the Amina (14 on the sketch map); and thence to Potrero (15 on map). At Potrero Ostrea and Spondylus were found, but badly preserved. Returning to Cercado the work was interrupted by a ten foot rise of the Rio Mao. Indeed, even before this rise the cur- rent had been very swift and the fording deep. Politically also the situation was becoming daily more dangerous, especially on approaching nearer to Santiago, where Desiderio Arias, the leader of the revolution, was entrenched. It was deemed best to take the fossils secured back to Monte Cristi and so get them safely out of the interior to the port, then to obtain supplies that were needed, and try a fresh start for Santiago. The furthest point reached up the Mao was Hato Viejo (the one mentioned by Gabb, zo¢ Hato Viejo on the Amina); and on the summit of the last accessible bluff, which rises some 300 feet above the river at that point, the aneroid read 650 feet, but we feel little confidence in this and give it only as approximate. There is a splendid view from the top of this cliff, looking south- ward, of the broken foothills of the main range. Gabb men- tions four terraces here. Our party saw one very striking high level terrace about 700 feet, and a lower less pronounced terrace about 640 feet, giving an approximate difference of 50 feet. There were also other levels at a lower altitude and to the south- west, but they were ill-defined. The party returned along the outward trail as far as Las ante We the Cae: Pe: ao hes 1 i 10) b x ay IPI, 23, Wolll § BULL. AMER. PAL. No. 20, Pl. 2 Plain of Las Caobas near Sabaneta Crystalline Outcrop, Arroyo Savana Larga at El Guanal 173 DoMINICAN FossiLs-—-MAuRY 9 Caobas, where they branched off to the southwest for Sabaneta. On approaching the Cana River a limestone with enormous Tur- edo tubes was seen. | On crossing the Rio Cana at Caimito (16 on sketch map) in the gorge a terrace was observed about fifty feet below the general level and beneath this terrace the gorge is about fifty feet deep. The river appears from this to have been rejuvenated and the uplift to have been recent. Very beautiful fossils were collected on the Rio Cana. Af- ter making collections and sections, the party rode on to Saba- neta and along the Rio Guayubincito to the town of Guayubin- cito (17 on the map), and then followed aroad more to the west to Las Lomas (18 on the map). Between Guayubincito and “Las Lomas large Ostreas were seen resembling those collected at Escalantes. Proceeding on to Castenuela, several fossiliferous outcrops were noted along the road, perhaps Pleistocene, — per- haps equivalents of Gabb’s outcrops on the road to Guayubin. It was unfortunately impossible to stop to collect because of the late hour, pouring rain, and the exhausted state of the horses. So there was no choice but to press on to Monte Cristi. The party arrived at Monte Cristi none to soon, as the Rev- olutionary party had begun shooting. All Americans took refuge on the United States gunboat Panther, and remained on board four days. The Dominican residents who did not join the rebels fled to the beach. The town was deserted, the bush full of rebels, ban- dits and malo gente. A return to the field from the direction of Monte Cristi was obviously impossible. Proceeding on to Puerto Plata we hoped to erika) in from there to Santiago, as under normal conditions a cog-wheel rail- road connects these towns. But Desiderio had captured all the locomotives. Moreover we met at Puerto Plata the American residents of Santiago as refugees who had left all their posses- sions and secretly fled under cover of night. Several had hidden in the bush without food for some days. Conditions in the in- 10 BULLETIN 29 | 174 terior were such that we were most urgently advised to abandon the attempt to reach Santiago, since Desiderio was entrenched there, and geologizing in the lonely thickets would certainly re- sult in our being shot and never heard of again. The sight of seven dead men on the pier at Macoris convinced us that this was no idle fancy. So with profound regret we were forced to abandon the Santiago section and the study of the blue clays of the Upper Yaqui and the Nivaje, but we trust that we may yet accomplish this on a future occasion. 175 DOMINICAN Fossirs—MaAury II VMOLTUSeGx GrAS> GAS Tk @ ODA ORDER OPISTHOBRANCHIATA Suborder Pteropoda Genus CavoLina Abildgaard Cavolina, sp. indet. Shell minute, resembling in some respects the recent C. gzb- bosa Rang, but not identical with that species. The ventral sur- face is extremely globular, evenly rounded, not crested as in C. gtbbosa. The dorsal surface is flat, projects beyond the opening, curves upwards slightly and is strongly tri-sulcate. The single shell found is too imperfect for detailed description. Attention is merely called to the presence of the genus. A species near C. gtbbosa is also reported by Dr. Dall from the Bowden beds, Ja- maica. Locality. — (Exp’d ’16) Bluff 3, Cercado de Mao. Suborder Tectibranchiata Genus Actaon Montfort Act@on riomaensts, n. sp. Plate 3, Figure 1 Act@on cubensis Gabb (in part), Trans. Amer. Phil. Soc., vol. 15, p. 245, 1873. Not the recent shell. 12 BULLETIN 29 176 Acton punctostriatus Dall (in part), Bull. Mus. Comp. Zool. Harv. Coll., vol. 18, p. 40, 1889: Trans. Wagner Inst. Sci., vol. 3, pt. 1, p- 14, 1890. Not A. punctostriatus C. B. Adams 1840. Shell ovate, with four and a half gently convex whorls, su- ture well defined; outer lip thin, produced anteriorly; inner lip with a slight callus; columella straight, bearing a single very strong plication; last whorl ornamented with a series of fine spirals, appearing under a lens as delicately puncticulate or finely serrate lines which extend usually over half, but sometimes over all the volution and are occasionally obsolete; examined under the compound microscope the sculpture is seen to consist of nar- row grooves, with cross bars, alternating with wider smooth bands, the barred grooves producing the punctate effect when less highly magnified. Length of large specimens 4.5, greatest width 2.25 mm. Our species is evidently* that which Gabb also collected and identified with d’Orbigny’s recent Cuban shell A. punctata (La Sagra, Hist. Pol. y Nat. Isla de Cuba, Atlas 8, pl. 17, figs. 1o- 12). Since that name had been preoccupied by Lea, Gabb re- named Orbigny’s shell A. cubenszs (Trans. Amer. Phil. Soc., vol. I5, p- 245, 1873). But the Dominican species is not identical with the recent Cuban shell, which is only about half the size of the Dominican fosssil,— measuring about 2.25 to 2.50 mm. and having five whorls, while the fossil shells of that size are imma- ture, with only three volutions. Moreover the plication of the fossil is much stronger and the magnified sculpture of d’Or- bigny’s shell as figured is quite unlike that of our shell. Gabb’s name 4. cubensis should stand only for the recent form called by d’Orbigny A. punctatus. *Gabb’s specimens of this 4c/g@on and all of his Dominican types have been for two-score years in the possession of the Philadelphia Academy. For years they have been undergoing a gradual revision. Until such time as this is completed they are not available for comparative study. Fortu- nately we have generally had access to Gabb’s metatypes. 177 DOMINICAN FossILS—MaAuRy 12 Our specimens when compared with figures of Adams’ 4. punctostriatus (first found in New Bedford harbor) appear quite different. The Dominican shells are slenderer and much larger, an individual measuring .10 X .075 inches (which are the measure- ments given for 4. punctostriatus) is immature and with three in- stead of four or five whorls. The form of the spire is also unlike and the body whorl of the Dominican shell is much less inflated. Locality — (Exp’d’16) Bluff 3, Cercado de Mao (abundant). Genus AC’TEOCINA Gray Acteocina canaliculata Say Plate 3, Figure 2 Volvaria canaliculata Say, Jour. Acad. Nat. Sci. Phila., vol. 5, p. 211. Bullina canaliculata Say, Amer. Conch.. pl. 39, 1830. Tornatina canaliculata Guppy, Geol. Mag., p. 437, 1874. Tornatina canaliculata Dall, Bull.37 U. S. Nat. Mus., p. 84, pl. 52, fig. 27, 1889; Trans. Wagner Inst: Sci., vol. 3, pt. 1, p.15, 1890; Jd. pt. 6, p. 1583, 1903. Not Jornatina canaliculata d’Orbigny, De la Sagra, Hist. Pol. y Nat. Isla de Cuba, p. 133, pl. 4 d2s, figs. 21-24 (—=T. ballata Kiener). Shell minute, cylindrical, marked by faint, arcuate, longitu- dinal growth-lines; spire channeled, somewhat elevated, apex projecting as a fine point; whorls about five; outer lip arcuate, inner lip with a thin calcareous plate, and a single plication near the base. Length 3, greatest width 1.5 mm. This widely distributed and variable species is now living from Cape Cod to the Florida Keys and in the Gulf of Mexico. Dall reports it from the Pliocene of Florida, Post-Pliocene of South Carolina and Florida, and a varietal form from Bowden, Jamaica. Guppy listed the species in 1874 from the Pliocene of Trinidad. It has not heretofore been found in the blue clays of Santo Domingo, but our shell agrees well with Say’s figure of the type which was collected on the coast of South Carolina. Localities. — (Exp’d ’16) Bluff 3, Cercado de Mao (rare); Zone H, Rio Cana near Caimito. 14 BULLETIN 29 178 Acteocina recta d’ Orbigny Plate 3, Figure 3 Bulla recta d’Orbigny, De la Sagra, Hist. Pol. y Nat. Isla de Cuba, vol. 5, p-. 67, no. 55, 1845; Atlas 8, pl. 4 dzs, figs. 17-20, 1855. Tornatina recta Gabb, Trans. Amer. Phil. Soc., vol. 15, p. 246, 1873. Tornatina coix-lacryma Guppy (in part), Quart. Jour. Geol. Soc. Lon- don, vol. 22, p. 518, 1876. Not 7. cotx-lacryma Guppy, Geol. Mag., vol. 4, p. 500, fig. 3, 1867. Tornatina recta Dall, Trans. Wagner Inst. Sci., vol. 3, pt. I, p. 15, 1890, /d. pt. 6, p. 1583, 1903. Cf. Zornatina coix:lacryma Cossmann (in part), Journ. de Conchyli- ologie, vol. 61, p. 4, pl. 1, figs. 12, 13, 1913. Shell minute, oblong, cylindrical, chiefly smooth, a few spe- cimens very finely, obsoletely, microscopically, spirally sub-stri- ate; spire very short, the first whorl projecting as a knob; su- ture canaliculate, aperture linear, widening suddenly; columella smooth. Length of shell 2.5, greatest width 1.25 mm. This species differs markedly from A. cotx-lacryma Guppy in the form of the spire. In A. cotx-lacryma the spire is sunken and only the knob-like point is visible above the plane of the last whorl; while in A. recta the spire though short is not sunken and the coils of the volutions can be seen below the apical knob. We have a number of Gabb’s specimens (C. U. Museum No. 7637) for comparison. M. Cossmann has referred a specimen from Martinique to 4. coix-lacryma, in the synonymy of which he places A. recta. The Martinique shell is nearly three times as large as Gabb’s, d’Or- bigny’s, or ours. Gabb and Guppy identified 4. vecta from Santo Domingo, and Dall from the Bowden beds, Jamaica. Locality. —(Exp’d’16) Bluff 3, Cercado de Mao. Acteocina (Cylichnella) triticum-tritonts, n. sp. Plate 3, Figure 4 Cylichnella bidentata Gabb (in part), Trans. Amer. Phil. Soc., vol. 15, Pp. 273, 1873. 179 DoMINICAN FossILts—MaAury 15 Cylichna bidentata Guppy, Quart. Jour. Geol. Soc. London, vol. 32, p. 518, 1876. Cylichnella bidentata Dall (in part), Bull. Mus. Comp. Zool. Harvard Coll., vol. 18, p. 46, 1889. Tornatina ( Cylichnella) ovum-lacertt Dall (in part), Proc. U. S. Nat. Mus., vol. 18, no. 1035, 1895. Not Bulla bidentata d’Orbigny, De la Sagra, Hist. Pol. y Nat. Isla de Cuba, p. 125, Atlas, pl. 4, figs. 13-16, 1845. Not Cylichna biden- tata Adams, 1850. Not Cylichnella bidentata Gabb, Proc. Acad. Nat. Sci. Phila., vol. 24, Pp. 273, pl. 10, fig. 2, 1872. (Recent Cuban shell, figured after d’Orbigny’s. ) We collected several hundred shells of a Cylichnella, in the blue clays of Santo Domingo, of which the larger measure 3 mm. in length and 1.25 to 1.50 mm. in greatest width. The majority ~ of the shells are slightly smaller than 3mm. All are grooved with incised spiral lines only at the base. Thus in size and sculpture our fossils resemble d’Orbigny’s recent shell, C. dzdentaza living from Hatteras to Santo Domingo. But the anterior plication in the recent shell is represented in both d’Orbigny’s and Gabb’s figures as very prominent. In our fossil shells it is so inconspicuous as to be scarcely observable. The posterior fold on the contrary in the fossils is very strongly developed. This appears to be just the reverse of the conditions in C. btdentata. In the columellar characters our fossils are more like Guppy’s C. ovum-lacerti, which has a single strong tortuous columellar fold. But our species is much smaller than Guppy’s Trinidad shell and is striate only at the base instead of over the entire surface. Guppy himself pronounced Heneken’s Santo Domingo specimens an allied but smaller species. Gabb also collected specimens of our species in Santo Do- mingo, as we have some he sent to Cornell (C. U. Museum No. 7638), but among them is one single larger shell measuring 4 x 2 mm. This may be that which Dr. Dall unites with Guppy’s ovum-lacertt. None of ours attain that size. 16 BULLETIN 209 180 Localities. —(Exp’d ’16) Bluff 3 (very abundant), Bluff 2 (one only), Cercado de Mao; Zone H (one only), Rio Cana at Caimito. Acteocina (Cylichnella) ovum-lacerti Guppy Cylichna ovum-lacerti Guppy, Geol. Mag. London, vol. £1, p. 407, pl, 18, fig. 22, 1874. Cylichnella bidentata Gabb (in part), Trans. Amer. Phil. Soc., vol. 15, De ZIG, Wa. Tornatina (Cylichnella) ovum-lacerti Dall (in part), Proc. U. S, Nat. Mus., vol. 18, no. 1035, p. 27, 1895. As noted under the preceding species, among hundreds of Cylichnellas we have none over 3 mm. in length; but one of Gabb’s Dominican shells sent to Cornell (Museum No. 7638) as C. bidentata is 4 mm. in length by 2 in width. The shell is worn so one cannot tell whether the entire surface was striate, but its size alone discriminates this shell from all the rest. Apparently it is referable to Guppy’s species. As with all of Gabb’s Dominican specimens, no locality is given; but Dr. Dall has identified as C. ovum-lacerti specimens No. 113746 in the U. S. National Museum from Potrero, Rio Amina. The type locality was Trinidad. Genus Vo_vuLta A. Adams Volvula cylindrica Gabb Plate 3, Figure 5 Volvula cylindrica Gabb, Trans, Amer. Phil. Soc., vol. 15, p. 246, 1873. Volvula cylindrica Guppy, Quart. Jour. Geol. Soc. London, vol. 32, p. 518, 1876. Volvula oxytata Bush, Trans. Conn. Acad., vol. 6, p. 468, pl. 45, fig. 12, 1885. Volvula oxytata Dall, Bull. 37, U. S. Nat. Mus., p. 86, pl. 41, fig. 12, 1889. } Volvula cylindrica Dall, Trans. Wagner Inst. Sci., vol. 3, pt. 1, p. 16, 1890; /d. pt. 6, p. 1583, 1903. Cf. Bulla (Volvula) cf. oxytata Toula, Jahrb. K—K. Geol. Reichs- anst., Wien, vol. 58, p. 709, pl. 28, fig. 4, 1908. 181 DoMINICAN Fosstrs-—MAURY 17 Shell minute, sub-cylindrical, anterior end rounded, marked by a few faint, fine striae, posterior end sharply and conspicuous- ly pointed; aperture linear, widening anteriorly, inner lip slightly thickened at the base and reflexed. Length of shell 4 mm., greatest width 1.5 mm. Dr. Dall notes that this species is identical with Miss Bush’s recent species Volvula oxytata, now living from Hatteras to Cape | Fear and reported doubtfully from the West Indies. To a less degree it resembles the Cuban recent shell, Volvula acuta d’Or- bigny, which is broader and less cylindrical in form. V. cylindrica was found by Dall in the Bowden beds, Ja- maica. The type locality is Santo Domingo. Guppy also iden- tified it in Heneken’s collection from the Yaqui Valley. Localities. — (Exp’d ’16) Bluff 2, Cercado de Mao (very rare); Bluff 3, Cercado (very abundant); Zone I, Rio Cana (scarce). Genus RETuSA Brown Retusa yaquensts, n. sp. Plate 3, Figure 6 Shell small, sub-cylindrical, broadening slightly anteriorly, not constricted near the middle; minutely perforate; spire sunken, umbilicate; outer lip elevated posteriorly above the spire, its margin forming a U-shaped upward curve, then it becomes a trifle inflected along the center, and slightly produced anteriorly; inner lip thickened anteriorly and reflected over the umbilical re- gion; pillar with a single plication; anterior end of the shell sculptured by about half a dozen faint, wavy, unequal spiral lines; posterior end similarly sculptured with about twice as many spirals extending a varying distance up towards the center of the whorl. Length of shell 3.50, greatest width 1.50. This appears to be the first Refwsa found in the blue clays of Santo Domingo., It is rather scarce. Localities. — (Exp’d ’16) Bluff 3, Cercado de Mao (one speci- men); Zone H, Rio Cana (six specimens). 18 BULLETIN 29 182 Genus Atys Montfort Atys doliolum, n. sp. Plate 3, Figure 7 Shell minutely cask-shaped, centrally inflated, narrowing to- wards either end; aperture as long as the shell, extending behind the inner lip and descending with a twist upon the apical region of the concealed spire; outer lip rising abruptly above the peri- phery, its outer margin forming an angle of about 65°, then continuing in a gentle curve to the base, where it is slightly ex- panded and sub-truncated; inner lip with a callus, thickest an- teriorly; pillar straight, smooth; posterior periphery of body whorl bordered with a callus band continuous with the callosity of the inner lip and with the angulated margin of the outer lip; body whorl smooth medially, sculptured anteriorly and poster- ly with fine, incised spiral lines. Length of shell 2.75, greatest width 1.25 mm. This pretty and rare little shell is strikingly like the Chipo- lan Oligocene species Atys edemata Dall (Proc. U. S. Nat. Mus. Not Togs volmeaie 2s. 1Soshabrans) Wace. mimsthvolaie a ot anor pl. 59, fig. 24, 1903). But the specimens described of that spe- cies were nearly twice as large as our Dominican shells, and even so were immature. The heavy callus bands would indicate that our little shells have attained their full growth, though so minute. Apparently this is the first Atys ever found in the Santo Domin- go blue clays. Locality. — (Exp’d ’16) Bluff 3, Cercado de Mao (rare). Genus BULLARIA Rafinesque (Bulla Linné) Bullaria paupercula Sowerby Plate 3, Figure 8 Bulla paupercula Sowerby, Quart. Jour. Geol. Soc. London, vol. 6, p. 52, 1849. Bulla paupercula Gabb, Trans. Amer. Phil. Soc., vol. 15, p. 246, 1873. 183 DOMINICAN FossiLs—MAuRY 19 Bulla paupercula Guppy, Geol. Mag. London, p. 437, 1874; Quart. Jour. Geol. Soc., vol. 32, p. 518, 1876. Bulla paupercula Dall, Trans. Wagner Inst. Sci., vol. 3, pt. 1, p. 18, 1890. Bulla ey, Dall, Trans. Wagner Inst., vol. 3, pt. 6, p. 1583, 1903. Shell ovate-oblong, smooth except for a few spiral impressed’ lines near the base; inner lip with a band of callus extending the entire length, but thickest anteriorly. Length of a good-sized shell 21, greatest width 12 mm. As Guppy and Gabb have noted, this species is very close to the recent Bulla amygdala Dillwyn, and Dr. Dall thinks it identical with Bulla striata Bruguiere, the Mediterranean ana- logue of B. amygdala. Our party collected quantities of BZ. amygdala from the Monte Cristi beach and the shells resemble greatly our fossils from the blue clays, but the recent tend to be nearly twice as large. As long as Sowerby’s species has been so much used it seems best to retain it for the fossil; but evidently the species has simply lived on apparently uninterruptedly and become the recent somewhat larger shell known as &. amygdala. Bulla paupercula is very common in Santo Domingo, where it was collected by Heneken and Gabb, and Dall lists it as Bulla striata from the Bowden beds, Jamaica. Localities. — Bluff 3, Cercado de Mao; Zone G, Rio Gurabo; Zones H and I, Rio Cana; sandy clays and gravels, Rio Cana. (Very abundant on the upper Cana. ) Bullaria Sarahberlinere n. sp. Plate 3, Figure 9 _ Shell large, ovate-cylindrical, spire deeply involute, sunken, outer lip slightly raised above the spire, rounded anteriorly; in- ner lip reflexed and thickened anteriorly and with a thinner, posterior callus; the surface of the shell in well-preserved speci mens is very beautifully marked with a series of very delicate lighter and darker alternating bands, parallel to one another and 20 BULLETIN 29 184 to the margin of the outer lip. These bands narrow and con- verge towards the spire and increase to a width of about 2 mm. at the middle of the shell. Due to an interesting optical qual- ity, these bands when viewed in reversed lights are interchanged, the light and dark zones changing place, like certain signs ar- ranged on a series of slats which read differently from diverse points of view. Length of shell 45, greatest width 32 mm. We found, as it were a nest, of about fifteen of these beau- tiful great Bullarias in a single spot up the Cana and nowhere else. In size and general form this species resembles specimens in the Newcomb collection of the large B. ampulla Linné from the East Indies. This magnificent species of the genus Azllaria is affection- ately and gratefully dedicated as a tribute to the memory of Mrs. Sarah Berliner. Locality. — (Exp’d ’16) Zone I, Rio Cana, near Caimito. Bullaria granosa Sowerby Plate 3, Figure 10 Bulla granosa Sowerby, Quart. Jour. Geol. Soc. London, vol. 6, p. 51, pl. 10, fig. 10, 1849. Bulla granosa Gabb, Trans. Amer. Phil. Soc., vol. 15, p. 246, 1873. Bulla granosa Guppy, Geol. Mag. London, p. 437, 1874; Quart. Jour., vol. 32, p. 518, 1876. Shell ovate-globular, thin, spire inrolled, body whorl ven- tricose, handsomely sculptured with fine impressed spiral lines crossed by longitudinal arcuate growth-lines; inner lip with a rather wide band of callus, thickest anteriorly, where it is defined by a narrow groove. Length of shell 22, greatest width 17 mm. This fine shell does not appear to have been found except in Santo Domingo. Sowerby quotes its resemblance to Bulla hydatis in form, but that species is very much more globose. Locality. —(Exp’d ’16) Zone I, Rio Cana. 185 DOMINICAN FossILS—MAuRY 21 Genus RrncicuLA Deshayes Ringicula dominicana, n. sp. Plate 3, figure I1 Ringicula semistriata 2? Gabb, Trans. Amer. Phil. Soc., vol. 15, p. 225, 1873. Not #. semistriata d’Orbigny. Cf. Ringicula tridentata Guppy, Quart. Jour. Geol. Soc. London. vol. 32, p. 518, 1876. Not &. tridentata Guppy, 1874. Shell exceedingly minute, broadly conic, with four to four and a half whorls, the apical obtuse and flattened; body whorl sculptured anteriorly by well-defined, microscopic, incised spiral lines, extending a varying distance over the whorl, but not further than the posterior limit of the aperture; inner lip with a callus and a single strong, lamellar plication on the body, colum- ella with two strong, parallel, proximate, oblique, lamellar plica- tions; outer lip thickened and having a single median tooth. The largest specimens are 1.5 mm. in length, greatest width .75 to 80 mm., but the large majority of the shells are only about 1 mm. long. This species bears considerable resemblance to Guppy’s un- figured FR. tridentata from Bowden, Jamaica, but both Guppy and Dall describe that species as entirely smooth. Cuppy re- ferred Heneken’s Dominican specimens to #. ¢rzdentaia, but pos- sibly they were smooth and did not show the characteristic basal striz. Gabb evidently had the same species as ours and referred it with a question to #. semistriata, a recent Jamaican shell de- scribed by d’Orbigny. Gabb remarked that his specimens seemed more elevated. Our shells appear not so inflated, the outer lip not so heavily thickened, the aperture wider, and the apex more blunt than d’Orbigny’s figures indicate. Moreover most of ours are only half the size of the latter species. Apparently the Do- minican species is distinct, but very closely allied to 2. semiséirt- ata. The Gatun analogous species, XR. hypograpta Brown and 22 BULLETIN 29 186 Pilsbry, is also sculptured over the anterior half of the body whorl, but the spirals are closer and the spire appears shorter and the body broader than in our shell. Locality. — Bluff 3, Cercado de Mao. (Abundant). ORDER CTENOBRANCHIATA (A.) SUPER-FAMIL VY TOXOGLOSSA Genus TEREBRA Adanson Terebra sulcifera Sowerby Plate 3, Figure 12 Terebra sulcifera Sowerby, Quart. Jour. Geol. Soc. London, vol. 6, p. 47, 1849. Terebra robusta Gabb (in part), Trans. Amer. Phil. Soc., vol. 15, p. 224, 1873. Not 7, robusta Hinds, Proc. Zool. Soc., p. 149, 1843. Terebra sulcifera Guppy (in part), Quart. Jour. Geol. Soc., vol. 32, p. 525, pl. 29, fig. 8. 1876. Heneken collected three Terebras in Santo Domingo, which Sowerby named sulcifera, inequalis and bipartita, from their striking characteristic sculpture. When Guppy, in 1876, examined the types he found he could establish no constant differences between them aud placed the last two species in the synonymy of the first. The extreme forms are, however, very different in aspect. T. sulcifera has the early whorls deeply sculptured, but with age the sculpture is lost and the whorls increase rapidly in diam- eter. Both these characteristics are more remarkably developed in the related species, 7. Gabdz Dall. The ornamentation of the earlier whorls of 7. salctfera con- sists of two thickened, sub-sutural bands, the second (anterior) being about half the width of the first, and both bands being crossed obliquely by very fine riblets. The two bands occupy about two-thirds of the whorl. The remaining third appears sunken and is crossed by very fine vertical riblets. After ten or more volutions this sculpture becomes progressively weaker, the 187 DOMINICAN FossILs—MAuRy 28 two thickened bands first losing their riblets. The three sets of riblets are at first discontinuous, but later become continuous. A fragment including nine whorls measures 65 by 15 mm. Specimens of 7. sulcifera from Bailey’s Ferry, Florida, have the early whorls exactly like those of the Dominican shells, but the second band in the later whorls tends to be slightly narrower. The species is also reported by Guppy and Dall from the Bowden beds, Jamaica. Our specimens were collected by Gabb in Santo Domingo. Terebra Gabbi Dall Terebra Gabbi Dall, Proc. U. S. Nat. Mus., vol. 18, no. 1035, p. 34, 1895. Terebra Gabot Dall, Trans. Wagner Inst. Sci., vol. 3, pt. 6, pl. 59, fig. 31, 1903. This singular species, which appears like an abnormality, is characterized by very rapid increase in diameter, and complete loss of sculpture on attaining old age. Dr. Dall’s type in a length of 70 mm. widened from 2.75 to 24mm. Itis a culmination of the tendency begun in 7. sulcifera. Type locality. — Potrero, Rio Amina (Bland). Terebra bipartita Sowerby Plate 3, Figure 14 Terebra bipartita Sowerby, Quart. Jour. Geol. Soc. London, vol. 6, p. 47, 1849. Not 7. dbipartita Deshayes, 1859. Terebra bipartita Gabb, Trans. Amer. Phil. Soc., vol. 15, p. 225, 1873. Terebra (Acus) bipartita Dall, Proc. U. S. Nat. Museum, vol. 18, no. 1035, P- 38, 1895. Whorls girdled by a single incised line cutting them into nearly equal halves; ornamentation of undulating longitudinal riblets rendered discontinuous by the girdling line. Length of a fragmentary shell 50, greatest diameter 12 mm. 24 BULLETIN 29 188 According to Sowerby the columella of 7. dzpartita is smooth, and Dall also says the pillar of this form seems to be simple and smooth. But our specimen which was sent by Pro- fessor Gabb to Cornell (Museum No. 7665) is broken away con siderably at the aperture and this reveals very definitely two sharp plications on the columella; —but far within, at least a quarter of a revolution, so that they could not been seen were the shell unbroken. The fact that the columella is biplicate in T. btpartita adds strong evidence to the relationship established by Dr. Dall of the three forms 7: spzvzfera, T. oligomitra and T. cirrus with T. biparizta. It seems much more probable that these three, which all have biplicate columellas, are of the d7pa7- tita group if b¢partita itself has two columellar plications. Apparently either Sowerby's specimens were perfect and the folds were completely hidden, or else what seems very probable, his descriptions of the characters of the columella of 7. dzpartita and his preceding species, 7: zxeqgualis, became transposed by some mistake, — for he says* of zxegualis, ‘columella antice bi- plicata’’ and of dzpartita, ‘‘columella antice laevi’’. As a matter of fact, as shown by the figure, our dzpartzta columella is bzplicate like all those of the dzsartzta group. Our zmeqgualis series shows that the columella may appear smooth when the shell is com- plete, but it invariably has within ove sharp plication. The type locality for 7: d¢partita is Santo Domingo; but it has also been found in the Chipola marls, Calhoun County, Florida. Terebra spirifera Dall Plate 3, Figures 15, 16 Terebra dislocata Gabb (in part), Trans. Amer. Phil. Soc., vol. 15, p. 225, 1873. Not dislocata Say. Terebra (Acus) bipartita (Sowerby) variety spirifera Dall, Proc. U. S. Nat. Museum vol. 18, no. 1035, p. 38, 1895. *Quart. Jour. Geol. Soc., vol. 6, p, 47, 1849, 189 DoMINICAN FossiLs-—-MAURY 25 Terebra (Oxymeris) btipartita (Sowerby) variety spirifera Dall, Trans. Wagner Inst. Sci., vol. 3, pt. 6, pl. 59, fig. 13, 1903. Shell of medium size, whorls twelve to fourteen, tapering rapidly to an acute spire; spiral ornamentation slightly more pro- nounced than the transverse. The former consists of typically four (sometimes reduced to three) narrow, flattened bands en- circling each whorl of the spire below the sutural zone. The transverse sculpture consists of many close-set riblets which cross the sutural zones sharply and almost perpendicularly, then swing back a trifle in the narrow subzonal channel, but resume a per- pendicular direction on passing under the four spirals which are wound over the riblets. The columella bears two sharp folds. . Specimens range from 25 to 35mm. The type measured 30X8 mm. In grouping the Dominican Terebras the presence or absence of columellar plications is of much assistance. Thus all the spe- cimens of spirifera, oligomitra, and cirrus show the two folds on the columella, a character which throws them into the 7. dzpar- tita group, and differentiates them readily from Toula’s Isthmian types. Localities. — (Exp’d ’16) Bluffs 2 and 3, Cercado de Mao; Zone I, Rio Cana near Caimito. Terebra cirrus Dall Plate 3, Figure 17 Terebra (Acus) bipartita Sowerby variety cirrus Dall, Proc. U. S&S. Nat. Museum, vol. 18, no. 1035, p. 38, 1895. Tecebra (Oxymeris) bipartita Sowerby variety czrrus Dall, Trans. Wagner Inst. Sci., vol. 3, pt. 6, pl. 59, fig. 28, 1903. This shell bears a general resemblance to 7. spzrzfera Dall, but can be distinguished from the latter species from the fact that in this shell the spirals are more numerous (five or more to a whorl instead of four), less raised, more irregular, and have a more crowded aspect. The transverse riblets are low, narrow, with wider interspaces. Columella with two sharp folds. Length 26 BULLETIN 29 I90 of type 25, greatest diameter 5.5 mm. Our specimens run from 21 to 32 mm. in length and 5 to 7 in greatest diameter. The biplicate columella at once places the species in the 7. bipartita group and separates it from the Isthmian 7. gatunen- sts, which it resembles somewhat in ornamentation. The type of 7. civrus is from the Rio Amina. Localities. — (Exp’d ’16) Zone G, Rio Gurabo, at Los Que- mados; Zone I, Rio Cana, at Caimito; and Bluff 3, Cercado de Mao. Terebra oligomitra Dall Plate 3, Figure 18 Terebra (Acus) bipartita Sowerby variety oligomitra Dall, Proc. U. S. Nat. Museum, vol. 18, No. 1035, p. 38, 1895. Terebra (Oxymeris) bipartita Sowerby variety oligomitra Dall, Trans. Wagner Inst. Sci., vol. 3, pt. 6, pl. 59, fig. 29, 1903. This species resembles 7: spzrvzfera Dall, but the ornamen- tation is bolder and more striking. Asin that species there are four spiral bands between the sutural zones, but the spirals in this shell are of less nearly equal in width and less strongly de- fined. In sfzrifera the spirals are somewhat stronger than the transverse riblets, but in o/igomitra the opposite is true, the rib- lets being very sharp, thin, and well-defined. The three poster- ior spirals of the four lying between the sutures are narrower than the anterior one and tend to group themselves together. Subzonal channels striking. Columella rather long, twisted, bearing two sharp folds. Length of decollate shell (of nine whorls) 36 mm., diameter 8. The type, also decollate, measured 38 by 8.5 mm. This species attained a somewhat larger size than its nearest ally, 7. spivifera. Its biplicate columella places it at once in the T. bipartita group. The type locality is the Rio Amina. Locality. — (Exp’d ’16) Bluff 3, Cercado de Mao. I9I DOMINICAN FossILsS—MAuRY 27 Terebra gausapata variety levifasciola, n. var. Plate 3, Figure 19 Shell small, very slender and elongate, resembling 7. gawsa- pata Brown and Pilsbry from Gatun (Proc. Acad. Nat. Sci. Phila., pp. 340-341, pl. 22, figs. 8, 9, 1911) and is probably a va- ciety of that species. The specimens of 7: gausapata were frag- mentary, but they show the strikingly deep sulcus beneath the subsutural fasciole which is very marked in the Dominican shell. In gausapata, however, this fasciole is ornamented with three spirals, while in our shell it is smooth. This has suggested the varietal name. Our shell has sixteen whorls, separated by a wavy suture; each whorl is sculptured by about fifteen longitudi- nal riblets which are very strongly developed on the subsutural band, but on crossing the deep sulcus are low and diminished to half their thickness, they then continue over the remainder of the whorl ina slightly oblique direction. The anterior portion of each whorl is ornamented by about seven spiral threads which do not cross the riblets; columella with two sharp folds. Length of shell 18, greatest diameter 3.5 mm. Rare. The biplicate columella and the deep sulcus beneath the sub- sutural band show the close relationship of this shell to the 7. bipartita group. Locality. — (Exp’d ’16) Bluff 3, Cercado de Mao. Terebra Cambiarsoz, n. sp. Plate 3, Figure 20 Shell small, acute, whorls about eleven, all except the nu- clear being ornamented with narrow, longitudinal riblets; sub- sutural band distinct, marked off by a narrow, deep sulcus, the portion of the whorl anterior to this sulcus sculptured with two sharply incised spiral lines which do not cross over the longitu- dinal riblets. Columella with two distinct plications. Length of shell 14, greatest width 4mm. Rare. In its size and in the scarcity of spiral lines sculpturing the 28 BULLETIN 29 192 whorls this shell recalls 7. amztra Dall from Potrero, Rio Am- ina; but it can be instantly differentiated from that shell by the absence in amztra of any definite sub-sutural band and sulcus. Indeed 7. Cambiarsoz is quite distinct from any of the many Terebras in the Cornell Museum; but its sharply biplicate col- umella and deep sulcus beneath the sub-sutural fasciole place it in the 7. dtpartita group of which so many of the Santo Domin- go Terebras are representatives. This species is named in honor of Senor Rodolfo D. Cambi- arso, of Santo Domingo City, a most ardent student of the nat- ural history and archeology of his native island. Locality. —(Exp’d’16). A single specimen was found in Bluff 3, Cercado de Mao. Terebra amitra Dall Plate 3, Figure 21 Terebra (Oxymeris) amitra Dall, Proc. U. S. Nat. Mus., vol. 18, no. 1035, Pp. 39, 1895; Trans. Wagner Inst. Sci., vol. 3, pt. 6, pl. 59, fig. 19, 1903. We unfortunately did not collect any specimens of this rare little Terebra, of which there is a single shell in the National Museum. It measures 9.5 mm. in length and was collected at Potrero, Rio Amina. Terebra protexta Conrad Plate 4, Figure 1 Cerithium protextum Conrad, Proc. Acad. Nat. Sci. Phila., vol. 3, p. 26, 1845. Terebra dislocata Gabb (in part), Trans. Amer. Phil. Soc., vol. 15, p. 225, 1873. Not dislocata Say. Exclude synonymy. Acus protextus Dall, Rep. Blake Gastr., Bull. Mus. Comp. Zoology Harvard Coll., vol. 18. pp. 63, 65, 1889. Terebra (Acus) protexta Dall, Trans. Wagner Inst. Sci., vol. 3, pt. 1, Pp. 25, 1890. Shell small, slender, elongate, whorls sculptured with about 193 DOMINICAN FossiILs—MAuRY 20 eighteen very fine longitudinal riblets, well developed on the sub- sutural fasciole and continuing over the remainder of the whorl beneath the slight sulcus marking off the fasciole; spiral sculp- ture of four narrow, flat bands on each whorl between the fasciole and the suture of the following volution, and a spiral thread usually lies next to the suture, anterior to the bands. Length of fragmentary shell with eleven whorls, 12 mm., greatest diameter 4mm. Among some specimens labelled 7. dislocata Say by Gabb, collected by him in Santo Domingo (C. U. Museum No. 7666) is a single shell exactly like a specimen of 7. protexta Conrad in the Newcomb collection, dredged in Sarasota Bay. The latter is a typical example of Conrad’s species and its sculpture matches perfectly that of the fossil shell. The fossil is much more like the recent specimens of protexta than like the Miocene represen- tatives of that species. T. protexta is now living from Hatteras to Texas in 2-50 fathoms. It has apparently not been found in the recent Antil- lean molluscan fauna, but is present in the Miocene of the Caro- linas, Pliocene of South Carolina and Florida, and Post-Pliocene of North Carolina, and Florida. Unfortunately, like all Gabb’s specimens, our Dominican shell has no locality label further than Santo Domingo. Terebra inequalis Sowerby Plate 4, Figure 2 Terebra inegalis Sowerby, Quart. Jour. Geol. Soc. London, vol. 6, p. 47, 1849. Terebra inequalis Guppy, Quart. Jour. Geol. Soc., vol. 22, p. 290, 1866. Terebra inequalis Gabb, Trans. Amer. Phil. Soc., vol. 14, p. 224, 1873. Shell slender, tapering to an acute spire, earlier whorls with a sub-sutural raised band foliowed by a second band about half the width of the first, from which it is separated by an impressed line. The two bands occupy slightly more than half 30 : BULLETIN 29 194 the whorl. In the later whorls of large specimens the second band becomes more or less obsolete and the sulcus then appears to divide the whorl into unequal parts, which was the origin of the specific name. The entire shell is sculptured by very fine transverse riblets which are oblique posteriorly and become ar- cuate anteriorly on traversing each whorl. Young shells show fine spiral strize which are later obsolete. As noted under 7: dipartita, Sowerby by some error de- scribes the columella of zz@gualis as biplicate and that of dzpar- tita as smooth. ‘These remarks were apparently transposed since bipartita is biplicate, and inequalis appears smooth when the shell is perfect, but when the outer lip is broken away one distinct terminal plication is revealed. Columella short, with a slender, external keel. Length of medium sized shell of which the early whorls are lost 60 mm., greatest diameter 12, number of whorls included 17. This species is closely related to 7. sulcifera, which it re- sembles in the style of sculpture, but it differs in retaining its slender form throughout life and its sculpture does not become obsolete. Guppy reported 7. zxequalis from Cumana (Venezuela), and small specimens from Jamaica. Dall also cites it from the Bow- den beds, Jamaica. Localities. — (Exp’d ’16) Zones E and D, Rio Gurabo at Los Quemados. Terebra hattensts Dall Plate 4, Figure 3 Terebra hattensis Dall, Proc. U. S. Nat. Mus., vol. 18, no. 1035, p. 35, 1895. Terebra (Hastula) haitensts Dall, Trans, Wagner Inst. Sci., vol. 3, pt. 6, pl. 50, fig. 31, 1903. This species very closely resembles 7. znegualis, from which it may be differentiated by its bolder and less regular sculpture. Our figure shows the single, strong plication on the columella 195 DoMINICAN FossiIts—MAuRY 31 which places it in the 7: zxegualis group. An incomplete speci- men measures 50X10, and includes eleven whorls. Dr. Dall’s type measures 6211.5 mm. The type locality is Potrero, Rio Amina. Locality. — (Exp’d ’16) Bluff 1, Cercado de Mao. Terebra Petitz, n. sp. Plate 4, Figure 4 Shell rivaling in size the recent Oriental 7. flammea Linné. Our single specimen is decollate but seventeen whorls remain. The earlier of these show much the same sculpture as 7. inequalis of which I at first thought this might be a large variety. Length of incomplete shell 113, greatest diameter 19 mm. Clearly this splendid Terebra is of the 7. zaegualis stock. Its living ally and probable descendant is a rare shell, 7. texana Dall, found on Matagorda Island, Texas, (Proc. U. S. Nat. Mus. No. 1264, p. 502, pl. 29, fig. 8, 1902). But the two sub-sutural bands in the recent shell occupy two-thirds of the whorl instead of about half as in the fossil, and the longitudinal riblets are less continuous and less arcuate than in the fossil. Dr. Dall says 7. texana is the only true Terebra sensu stricto living on our coasts. Apparently the western migrants have lived on in the Gulf of Mexico but the ancestral members have become extinct in the Antilles. I take great pleasure in dedicating this fine Terebra to Mr. Isaac Petit, American Consul at Monte Cristi, as a mark of ap- preciation of his kindness to our party, his efficient aid, and his sincere interest in the welfare and success of our Expedition. Locality. — (Exp’d ’16) Zone A, Rio Gurabo, at Los Que- mados. Terebra gatunensis Toula Plate 4, Figure 5 Terebra dislocata Gabb (in part), Trans. Amer. Phil. Soc., vol. 15, p. 225, 1873. Not T. dislocata Say. 32 BULLETIN 29 196 Lerebra (Oxymeris) gatunensis Toula, Jahrbuch der K—K. Geol. Reichsanstalt Wien, vol. 58, p. 705, pl. 25, fig. 14, 1908. Terebra gatunensis Brown and Pilsbry. Proc. Acad. Sci. Phila., pp. 339, 340, pl. 22, fig. 2, rgrt. Terebra (Myurella) gatunensts Cossmann, Jour. de Conchyliologie, vol. 61, pp. 13, 14, pl. 1, figs. 26-29, 1913. Shell slender, tapering to a very acute spire, whorls of a decollate specimen 13, each whorl ornamented with a subsutural — band about a quarter the width of the whorl. The band is marked off by a sulcus beneath which are typically seven, more often six, spiral cords. (The seventh frequently being concealed by the following volution). Transverse sculpture of many, very fine riblets which traverse the subsutural bands in a nearly ver- tical direction, but swing back slightly at the furrow, then be- come somewhat arcuate on crossing the seven spirals. Toula mentions twelve riblets on half a volution. This is the case with a diameter of 8.5 mm., that of Toula’s specimen, which was a young shell; but the number of riblets increases on the later, larger whorls. Columella hardly plicate, but sharply keeled at the back. Length of decollate shell 50 mm., greatest diameter 10.5 mm. This species can easily be distinguised from 7. spirvifera and T. cirrus (of the T. btpartita group), which it resembles in sculp- ture, by their both possessing two sharp plications on the colum- ella, while gatunenszs is nearly smooth, with only a faint sug- gestion of a single fold. It is more difficult to discriminate be- T. gatunensts and some variations of 7: Wolfgang, as these two species are very closely allied. T. gatunensts is found on the Isthmus at Gatun, Mindi, and Monkey Hill; and Cossmann refers a fragmentary shell from Mar- tinique to this species. Locality. — (Exp’d ’16) Bluff 3, Cercado de Mao. 197 DoMINICAN FosstLs-—MAURY Be Terebva Wolfgangt Toula Plate 4, Figure 6 Terebra dislocata Gabb (in part), Trans. Amer. Phil. Soc., vol. 15, p. 225, 1873. Specimens Gabb Coll. Cornell Paleont. Museum No. 7666. Not 7. dislocata Say. Terebra Wolfeangi Toula, Jahrbuch der K—K, Geol. Reichsanstalt Wien, vol. 58, pp. 705, 706, pl. 28, fig. 7, 1908. Terebra Wolfgangi Brown and Pilsbry, Proc. Acad. Nat. Sci. Phila., PP- 340, 341, pl. 22, figs. I, 3-6, 1911. Shell slender, acute, resembling 7. gatunensts in form and size; whorls of a decollate shell twelve; ornamentation on each~ whorl consisting of a subsutural band, occupying slightly less than one-third of the width of the whorl, and marked off by a furrow beneath which are five spiral cords (the fifth sometimes covered by the following whorl) extending to the suture of the next volution. A striking characteristic of this species is that the sub-sutural band is cut by several incised, revolving spiral lines which bisect or trisect the band. The transverse sculpture consists of many very fine riblets (about thirty-three on a whorl with a diameter of 8mm). These cross the sub-sutural band in a slightly obliquely direction, are interrupted by the furrow, and become gently arcuate on crossing the five spiral cords. Length of decollate shell 40 mm., greatest diameter 8 mm. Toula likens 7. Wolfgangi to the recent 7. pertusa Born; but on comparing our specimens with those of 7. pertusa in the Newcomb collection, the relationship is evidently only a very general one. The species has a much closer resemblance to the fossil shells 7: gatunensis, spirifera and cirrus. The last two can be quickly separated from Wolfgang? by their bi-plicate columellas; but it is more difficult to distinguish Wolfgang7 from some forms of gatunensis. The tri- or bi-secting of the sub-sutural band in Wolfgangz is a useful guide. A number of authors have reported Wolfgangz from the Isthmus. It is to be regretted that we obtained no specimens of this shell on our 1916 Expedition, and have only two collected 34 BULLETIN 29 198 by Professor Gabb without locality label further than Santo Domingo. Terebra Berlinere, n. sp. Plate 4, Figures 7, 8 Shell slender and graceful, tapering to an acute spire, volu- tions rounded between the sub-sutural zones, which slightly con- strict the shell. Whorls twelve to fourteen, the two nuclear smooth, the third and fourth ornamented with transverse riblets. The sub-sutural band begins to appear on the fifth and becomes defined on the sixth and seventh whorls. Spiral lines appear faintly on the fourth and fifth but do not become sharply de- fined until the eighth whorl. The sculpturing of the species is remarkably beautiful. It consists on all but the earliest whorls of the sub-sutural, constricting band occupying about one-fifth of the whorl and marked off by a narrow sulcus, below which are eight to ten narrow, flat spiral bands. Some of these may be sub-divided, forming many fine threads resulting in as many as fourteen or more spirals of different widths instead of the more typical eight or nine sub-equal spirals. Transverse sculpture of many very fineriblets, about thirty-six on a whorl having a di- ameter of 8 mm.; but the riblets may become more crowded and very close-set. Columella short, very sharply keeled at the back, anterior canal deeply notched: Length 38, greatest diameter 9mm. The species most closely resembling 7. Berliner are T. gatunensts Toula and 7. cirrus Dall; but it can at once be dis- criminated from these two species by its characteristically con- vex whorls, constricting sub-sutural bands and much closer, finer, and more delicate sculpture. This, perhaps the most exquisite of all the Santo Domingo Tertiary fossils is dedicated to the memory of Mrs. Sarah Berliner. Localities. — (Exp’d ’16) Gravels, Rio Cana; Zones H and I, Rio Cana, near Caimito. 199 DOMINICAN FossILs—MAuRY 35 Genus Conus Linné Conus haytensis Sowerby Plate 5, Figure 1 Conus Haytensis Sowerby, Quart. Jour. Geol. Soc. London, vol. 6, p. 44, 1849. Conus Haitensis Gabb ( in part), Trans. Amer. Phil. Soc., vol. 15, p. Pypite Sy. Conus Haitensis Guppy, Quart. Jour. Geol. Soc. London, vol. 32, p. p- 528, 1876. Conus Haytensis Brown and Pilsbry, Proc. Acad. Nat. Sci., Phila., p. 341, I9It. Shell very large, heavy, spire slightly elevated, spirally stri- ate, sub-coronate; last whorl with a sub-angulate shoulder and striate base; canal slightly reflexed. A large shell measures 110oX58mm. This species is akin to C. mols. It is found at Bowden and Gatun. Localities. — (Exp’d ’16) Bluff 1, Cercado de Mao; Zone E, Rio Gurabo at Los Quemados; Zone H, Rio Cano at Caimito. Conus haytensts var. gurabensis, n. vat. Plate 4, Figure 9 Shell large, solid; whorls about ten, the first three smooth, the two and a half following sculptured with many vertical, sub- equal riblets, interrupted by six small varices. The riblets and varices are crossed by close-set, fine revolving threads forming a somewhat cancellated ornamentation, quite different from the cor- onated spire of typical haytensis. The riblets then become obso- lete, and the following three and a half whorls are ornamented only with the fine, delicate, sharply defined spirals. These de- crease from fifteen or more and tend to become obsolete, so that the summit of the last whorl retains traces of only about five. Greatest diameter of shell 47 mm. Locality. —(Exp’d’16) Zone B, Rio Gurabo at Los Que- mados. 36 BULLETIN 29 200 Conus molis Brown and Pilsbry Conus molis Brown and Pilsbry, Proc. Acad. Nat. Sci. Phila. P- 343, pl23) fis orn: This large, Gatun species measures 124X71 mm. One ofa number of our puzzling Dominican cones very kindly examined by Dr. Dall was pronounced by him to be the young of C. molts. This adds another species to those common to the Isth- mus and Santo Domingo. Locality. — (Exp’d ’16) Bluff 3, Cercado de Mao. Conus Williamgabbi, n. sp. Plate 5, Figure 2 Shell large, solid, conic; whorls twelve, the first two nuclear, the following five forming the acute apex of the spire, remaining volutions of the spire very flat, each ornamented with four or more revolving spiral threads and with feebler growth-striz. Body whorl roundly carinated at the shoulder; upper portion smooth except for almost obsolete revolving striations, lower third ornamented with rather irregular, wavy spirals. Columella slightly plicate. Length 65, width 45 mm. This fine Cone was among a number of specimens of C. hay- tensts sent by Professor Gabb, but its extremely flat spire and difference of form show it to be distinct. It was collected by Professor Gabb in Santo Domingo and is named in his honor. Conus symmetricus Sowerby Plate 7, Figure 7 Conus symmetricus Sowerby, Quart. Jour. Geol. Soc. London, vol. 6, p. 44, pl. 9, fig. 1, 1849. Conus haitensis Gabb (in part), Trans. Amer. Phil. Soc.. vol. 15, p. 231, 1873. Shell turbinate, short and broad, spire short, spirally striate; body whorl sharply carinate at the shoulder, ornamented with granulose spiral threads alternating with one or two finer smooth 201 DOMINICAN FossILsS—MAuURY an spirals; the canal is slightly produced and a trifle reflexed. Length of shell 29, greatest width 18 mm. Locality. — (Exp’d ’16) Zone E, Rio Gurabo at Los Que- mados. Conus symmetricus variety domingensis Sowerby Plate 4, Figure 10 Conus Domingensts Sowerby, Quart. Jour. Geol. Soc. London, vol. 6, Pp. 45, 1849. Conus Flaitensis Gabb (in part), Trans. Amer. Phil. Soc., vol. 15, p. 231, 1873. Not. C. haytensis Sowerby. Conus Haitensis Guppy (in part), Quart. Jour. Geol. Soc. London, vol. 32, p. 528, 1876. Conus domingensis Dall, Trans. Wagner Inst. Sci., vol. 3. pt. 6, p. 1583, 1903. Conus domingensis Brown and Pilsbry, Proc. Acad. Nat. Sci., Phila., P- 341, IgII. Gabb and Guppy united Sowerby’s C. domingensis with C. symmetricus. A specimen of the former species loaned by Dr. Dall from the National Museum shows it to be a flat-topped, broader shouldered mutation of C. symmetricus. This elegantly sculptured Cone is very common in Santo Domingo and is found at Bowden and Gatun. Localities. — (Exp’d’16) Zones A, B, C, D, E, F, Rio Gur- abo at Los Quemados; Bluff 1, Cercado de Mao. Conus symmetricus variety semtobsoletus, n. vat. Plate 7, Figure 8 Shell resembling C. symmetricus in form but larger and with the granular spirals obsolete on the upper half of the body whorl. Length 39, greatest width 24 mm. The specimens were collected by Professor Gabb in Santo Domingo. Conus Sewalli,n. sp. Plate 5, Figure 3; Plate 6, Figure 3 Shell rather large, sub-pyriform, spire short, acute; post- 28 BULLETIN 29 202 nuclear whorls about eleven, the first eight being spirally striate and delicately coronate, the last three are slightly channeled and strongly striated spirally; body whorl roundly angulate at the shoulder whence the sides slope convexly to the base, the orna- mentation is limited to the lower two-thirds of the whorl and consists of beautiful, granular, spiral threads, the granules resem- bling the beads of a necklace; margin of outer lip nearly straight; posterior sinus rather deep; canal nearly straight. Length of largest shell 59, greatest width 33 mm. Dr. Dall most kindly examined this shell and noted that it had no representative in the collection of the National Museum. Apparently it is new. I take the greatest pleasure in naming this, our most ex- quisite Cone, in honor of Mr. Arthur Sewall of Philadelphia as a token of regard and gratitude for his encouragement and valu- able help in assisting the progress of the Expedition. Localities. — (Exp’d ’16) Bluff 1, Cercado de Mao; Zone E. Rio Gurabo at Los Quemados. Conus catenatus Sowerby Plate 5, Figure 4; Plate 6, Figures 1, 2 Conus catenatus Sowerby, Quart. Jour. Geol. Soc. London, vol. 6, p. 45, pl. 9, fig. 2, 1849. (Young shell). Conus interstinctus Guppy, Quart. Jour. Geol. Soc., vol. 22, p. 288, pl. 16, fig. 3, 1866. (Adult shell). Conus catenatus Gabb, Trans. Amer. Phil. Soc., vol. 15, p. 230, 1873. Conus catenatus Guppy, Quart. Jour. Geol. Soc., vol. 32, p. 527, 1876. Heneken’s shell chanced to be very young and Sowerby founded on it the species catenatus. Later Guppy described an adult specimen from Jamaica as C. zz/erstinctus. We have a series of the following sizes: 30X15; 40X20; 57X27; 85 X4o mm. The smallest of these is very like the original type figured by Sowerby. The largest Dr. Dall kindly compared with the type of Guppy’s zzzerstinctus and found it to be identical. Localities. — (Exp’d’16) Zone A, Rio Gurabo at Los Que- mados; Guayubin to Mao road at the ford of Rio Cana. 203 DOMINICAN Fossits—Maury 30 Conus stenostomus Sowerby Plate 6, Figure 4 Conus stenostoma Sowerby, Quart. Jour. Geol. Soc. London, vol. 6, p. 44, 1849. Conus stenostoma Guppy, /d. vol. 22, p. 287, pl. 16, fig. 2, 1866. Conus stenostoma Gabb, Trans. Amer, Phil. Soc., vol. 15, p. 230, 1873. Conus catenatus Guppy (in part), Quart. Jour. Geol. Soc. London, vol. 32, p. 527, 1876. Not C. catenatus Sowerby. Conus stenostomus Dall, Trans. Wagner Inst., vol. 3, p. 6, p. 1583, 1903. Shell characterized by a sharply angulated shoulder, narrow aperture, and profoundly sulcate posterior sinus. Our largest shell measures 62 X 34 mm. This species has also been found at Bowden. Localities. — (Exp’d’16) Bluff 1, Cercado de Mao; Zone B, Rio Gurabo at Los Quemados. Conus consobrinus Sowerby Piate 6, Figures 5, 6 Conus consobrinus Sowerby, Quart. Jour. Geol. Soc. London, vol. 6, p- 45, 1849. Conus consobrinus Gabb (in part), Trans. Am. Phil. Soc., vol. 15, p. 229, 1873. : Conus consobrinus Guppy, Geological Magazine, London, New Series, Decade 2, vol._1, pl. 17, fig. 3, 1874. Conus consobrinus Guppy, Quart. Jour. Geol. Soc., vol. 32, p. 527, 1876. Conus consobrinus Brown and Pilsbry, Proc. Acad. Nat. Sci. Phila., p, Syl 5 WOMEN Conus (Chelyconus) consobrinus Cossmann, Journ. de Conchyliologie, vol. 61, p. 46, pl. 3, figs. 17, 18, 1913. This was one of the nine new Cones collected by Heneken in 1849. It has also been found at Bowden and Gatun. Localities. —(Exp’d’16) Zones E and G, Rio Gurabo at Los Quemados. Conus granozonatoides, n. sp. Plate 6, Figure 7 Shell biconic, elongated, spire prominent, its earlier whorls 40 BULLETIN 20 204 coronate; whorls about thirteen, the nuclear smooth; the first eight post-nuclear ornamented by a row of many close-set tubercles near the base of each volution and, posterior to the tubercles, by several incised spiral lines, the tubercles become ob- solete rather suddenly on the third volution from the last, but the spirals continue, becoming fainter until they fade out com- pletely on the last whorl; body whorl with a roundly angulated shoulder whence it tapers to the base, marked by fine arcuate growth lines with occasional coarser resting stages; spiral sculp- ture of coarse, slightly granular threads strongest anteriorly, ob- solete posteriorly; aperture narrow, outer lip when complete notched at the summit, then swinging forward in a broad curve, retracted at the base. Length of shell, 55, greatest width 24 mm. Dr. Dall has very kindly examined this cone and pronouced it near Guppy’s C. granozonatus. Localities. — (Exp’d’16) Bluff 1, Cercado de Mao; Zones A and G, Rio Gurabo, near Los Quemados. Conus gracilissimus Guppy Plate 6, Figure 8 Conus gracilissimus Guppy, Quart. Jour. Geol. Soc. London, vol. 22, p. 288, pl. 16, fig. 4, 1866. Conus Orbignyit Gabb, Trans. Amer. Phil. Soc., vol. 15, p. 230, 1873. Not C. Orbignyi Audouin 1830. Conus gracilissimus Guppy, Quart. Jour. Geol. Soc. London, vol. 32, Pp. 527, 1876. Conus gracilissimus Dall, Trans. Wagner Inst. vol. 3, pt. 6, p. 1583. Conus gracilissimus Cossmann, Journ. de Conchyliologie, vol. 61, pl. Al sober, 1A, WES). The three Cones, C. gracilissimus, granozonatus and conso- brinus, are very closely related; and various authors have placed one or the other in synonymy. This is but one case of the in- tergradation of forms which is highiy characteristic of the Do- minican shells. One must either run very dissimilar forms to- gether, as did Gabb, or to some extent ignore connecting links. C. gracilissimus is widely distributed. Guppy found it at 205 DoMINICAN Fossi_s-—-MAuRY AI Cumana, in the Manzanilla beds of Trinidad and at Bowden. Our shell measures 4oX16 mm. It was collected by Gabb in Santo Domingo. Conus tortuosostriatus Toula Plate 6, Figure 9 Conus (Chelyconus) tortuosostriatus Toula, Jahrb. der K—K. Geol. Reichsanstalt Wien, vol. 61, p. 508, pl. 31, fig. 22, I9II. Conus (Hemiconus) tortuosostriatus Cossmann, Journ. de Conchy- liologie, vol. 61, p. 40, pl. 3, figs. 28, 29, 1913. Shell slender, graceful; spire elevated; whorls about ten, the first two smooth, nuclear; post-nuclear whorls sharply cari- nate, denticulate, marked by strong arcuate growth-lines and several incised spiral lines. Body whorl ornamented with about twenty, narrow, flat spiral bands with narrower interspaces. Length 22, width 8 mm. This pretty Cone is very near to C. gracilissimus, differing chiefly in the proportion of length to breadth, the ratio being approximately 3 to 1 against 2 to I. Localities. — (Exp’d ’16) Zones G and EH, Rio Gurabo at Los Quemados. Conus ornatus (Gabb’s name), n. sp. Plate 6, Figure 10 Conus ornatus Gabb, MS. Specimen No. 7671 Cornell University Mu- seum. No description found. Shell of medium size, solid, spire very low, each of its volu- tions marked with four strong spiral threads and faint arcuate growth lines; body whorl sharply carinate, beneath the carina the sides slope slightly convexly and steeply to the base; orna- mentation of about twenty-one very sharply incised spiral lines, obsolete on the upper fourth of the whorl. Length of shell 45, greatest width 27 mm. Our specimen was collected by Gabb in Santo Domingo and 42 BULLETIN 29 206 labelled C, ornatus. JI fail, however, to find any published de- scription of this species. Conus proteus Hwass Plate 6, Figure 11 Conus proteus Hwass, Enc. Meth. vers, I pt. 2, p. 682, 1789. Conus proteus ? Gabb, Trans. Amer. Phil. Soc., vol. 15, p. 232, 1873. ? Conus Berghausti ? Gabb, /d. p. 232. Not of Hoernes, Foss. Wie- ner Beck. pl. I, fig. 3. Conus proteus Dall, Trans. Wagner Inst., vol. 3, pt. I, p. 26, 1890. Like the recent C. proteus, our fossils have four or five re- volving rows of orange colored dashes, including less conspicuous, fainter, intervening rows. ‘The proportions of one of our shells are like the recent, measuring 42X23 mm. But that figured is longer, measuring 51 X 27. This species has lived on almost without change since the blue clays were accumulating on the sea floor. It is also found in the Florida Pliocene. Localities. —(Exp’d ’16) Zone H, Rio Cana at Caimito, Zone D, Rio Gurabo at Los Quemados. Conus Vanattaz, n. sp. Plate 6, Figure 12 Shell solid, turbinate, the length twice the width; remaining whorls seven, their summits marked by arcuate growth-lines, not striate, slightly, broadly channeled; body whorl sharply carinate at the shoulder whence the sides taper evenly to the base, body sculptured with twelve raised, revolving threads 3 mm. apart at the center, closer at the base. Length of shell qo, greatest width 20 mm. This shell was collected by Professor Gabb in Santo Domin- go and thought by him to be a mutation of C. planzliratus, but it is evidently distinct. It is named in honor of Dr. E. G. Van- atta of the Philadelphia Academy. i Conus furvoides Gabb Plate 7, Figures 1, 2 Conus furvoides Gabb, Trans. Amer. Phil. Soc., vol. 15, p. 232, 1873. 207 DOMINICAN FossILs—MAuRY 43 Shell elongate, nearly or quite smooth, sometimes with a few wavy spirals anteriorly, spire acute, rather low, with the later whorls deeply channeled. Length 41, width 20 mm. Apparently this is Gabb’s unfigured species. One of our specimens from Cercado retains its delicate lin- ear, revolving color pattern, of gray lines on a white background. The color scheme is of the general style of C. “gnarius Reeve. Localities. — (Exp’d ’16) Bluff 2, Cereado de Mao; Zones H and I, Rio Cana at Caimito. Conus Olssont, n. sp. Plate 7, Figure 3 Shell of medium size, very elongate, the length considerably more than twice the width; spire one-twelfth of the total length. Whorls eleven, the first two forming the protoconch rise abrupt- ably above the following whorls, on which they rest like a min- ute but striking pinnacle visible to the unaided eye. The three whorls following the protoconch are flattened and discoidal, the subsequent six slope more rapidly towards the shoulder angle of the body whorl, they are convexly rounded between the deeply impressed suture lines, and marked with slightly arcuate, oblique growth-lines. The specimen described shows only very faint, nearly obsolete striz on the spire. Body whorl roundly angu- lated at the shoulder, thence tapering evenly and gradually to the base, smooth except for a few irregular, more or less obsolete basal striz. Length 38, width 16 mm. This species is named in honor of Mr. Axel Olsson, by whom it was collected. Locality. —(Exp’d’16) Zone D, Rio Gurabo at Los Que- mados. Conus cercadensis, N. sp. Plate 7, Figure 4 Shell short, broad, solid, ficiform; nuclear whorls two; first four post-nuclear whorls with a well-defined, slightly overhang- AA BULLETIN 29 208 ing carina; subsequent four or five whorls broadly channeled, the channeling being most apparent on the summit of the last whorl; spire with no trace of spiral strize, but sharply marked by arcuate growth-lines; body whorl markedly convex below the shoulder carina, giving the shell its characteristic fig-shaped form; the sculpture of the last whorl consists of a varying number of spira] ridges, strongest anteriorly, fading out more or less posteriorly; some adult shells have the upper half of the body whorl nearly or quite smooth, while in others it is striate to the shoulder; aperture rather wide, posterior sinus deep. The relative pro- portion of breadth to height varies as follows: 27X16, 28X18, 29X20, 35X23 mm. Our specimens are identical with some labelled by Gabb C. cedo-nulli? But they are not the true C. cedo-nulli of Hwass. Locality. — (Exp’d ’16) Bluff 3, Cercado de Mao. (Abun- dant and characteristic. Conus Kitteredget, n. sp. Plate 7, Figures 5, 6 Shell with a short, acute, very concave spire, one-seventh the length of the shell, which is less than twice the width; earli- est two post-nuclear whorls faintly crenulate, the following three slightly carinate; a channel appears on the penultimate volution of the spire and on the last becomes well marked; spiral striz absent, the spire being smooth except for arcuate growth-lines; body whorl roundly angulated at the shoulder, the sides sloping convexly to a rather broad base; upper two-fifths of the last whorl typically nearly smooth, showing only faint, obsolete spiral striations; lower three-fifths with well-spaced, narrow ridges; aperture wide; outer lip sharp; posterior notch deep. Length of shell 31, greatest width 17 mm’ We have specimens with the ridges extending almost or quite to the shoulder of the body whorl (fig. 6). These appear to be a variety. They were found in the same zones as the typ- ical shells. 209 DOMINICAN FossILS—MAuRY 45 This species is closest to C. cercadensis, from which it can be distinguished by the concave spire and the much less con- vexity of the body whorl below the shoulder. They were analo- gous species, — C. cercadensis being characteristic of the Mao and C. Kitteredget of the Cana Rio. I take great pleasure in naming this species in honor of Mr. and Mrs. Kitteredge of Hastings-on-the-Hudson. Localities. —(Exp’d ’19) Zones H and I, Rio Cana at Cai- mito. Conus recognitus Guppy Plate 7, Figure 9 Conus solidus Sowerby, Quart. Jour. Geol. Soc. London, vol. 6, p. 45, 1849. Not C. solidus Sowerby, Zool. Proc. 1841: Conch. Illust. Conus No. 76, pl. 56, fig. 56. Conus solidus Guppy, Quart. Jour. Geol. Soc., vol. 22, p. 287, pl. 16, fig. 1, 1866. Conus recognitus Guppy, Proc. Sci. Assoc. Trinidad, p. 171, 1867. Conus pyriformis Gabb, Trans. Amer. Phil. Soc., vol. 15, p. 229, 1873. Not C. pyriformis Reeve, Conch. Icon., vol. 1, pl. 13, fig. 70, 1843. Conus recognitus Guppy, Quart, Jour. Geol. Soc. London, vol. 32, p. 527, 1876. Conus recognitus Dall, Trans. Wagner Inst. Sci., vol. 3, pt. 6, p. 1583, 1903. The recent C. pyriformis is the descendant of migrants through the Isthmus to the West Coast. Conus recognitus also occurs at Bowden. Localities. — (Exp’d’16) Bluff 3, Cercado de Mao; Zone D, Rio Gurabo at Los Quemados; Zones H and I, Rio Cano at Caimito. Conus planiliratus Sowerby Plate 7, Figure 10 Conus planilivatus Sowerby, Quart. Jour. Geol. Soc. London. vol. 6, p. 44, 1849. Conus planiliratus Guppy, /dem, vol. 22, p. 287, pl. 16, fig. 7, 1866. Conus planilivatus Gabb (in part), Trans. Amer. Phil. Soc., vol. 15, P 46 BULLETIN 29 210 230, 1873. Conus planiliraius Guppy, Quart. Jour. Geol. Soc. London, vol. 32, p. 528, 1876. Conus planiliratus Dall, Trans. Wagner Inst. Sci., vol. 3, pt. 6, p. 1583, 1903. Cf. Conus planilivatus Cossmann, Journ. de Conchyliologie, vol. 61, p. 48, pl. 3, figs. 25, 26, 27, 1913. Shell characterized by its concave spire and last whorl sculp- tured with twenty prominent bands, alternating with sulcate in- terspaces lightly striated longitudinally. Length 34, width 15 mm. Sowerby’s recent C. planilivatus (Proc. Zool. Soc., p. 255, pl. 22, fig. 1) is altogether different. The fossil species occurs in the Caroni Series, Trinidad, and at Bowden. ‘The type local- ity is Santo Domingo. The recent C. Stearnsiz Conrad may be a descendant. Conus marginatus Sowerby Plate 7, Figure 11 Conus marginatus Sowerby, Quart. Jour. Geol. Soc, London, vol. 6, p. 44, 1849. Conus marginatus Gabb, Trans. Amer. Phil. Soc., vol. 15, p. 230, 1873. Conus marginatus Guppy, Quart. Jour. Geol. Soc. London, vol. 32. p. 528, pl. 29, fig. 5, 1876. Cf. Conus (Chelyconus) marginatus Cossmann, Journ. de Conchylio- logie, vol. 61, pp. 44-46, pl. 3. figs. 14, 15, 1913. Shell small, broad and short, spire high, carinate, not coro- nate; last whorl deeply sculptured with about sixteen alternating, narrow bands and grooves, the latter marked with longitudinal strie. Length 19, width 11 mm. The nearest ally is €. gaza. Guppy reported C. marginatus from the Manzanilla beds, Trinidad. Localities. — (Exp’d ’16) Zones D and G, Rio Gurabo at Los Quemados. Conus gaza Johnson and Pilsbry Plate 7, Figure 12 2X11 DOMINICAN FossiL.s—MAurRyY 47 Conus gaza Johnson and Pilsbry, Proc. Acad. Nat. Sci. Phila., p. 342, fol, Aa, WES, Buea, Shell biconic, spire about one-third of the total length, di- ameter one-half the length; post-nuclear whorls about nine, lower edge of each carinate, last whorl sharply angulate at the shoulder, sculptured with twenty to twenty-two flattened ridges alternating with grooves striated by lines of growth. Length 25, width 14 mm. Our specimens show but one tuberculated post-nuclear whorl. This is said to be characteristic of the Dominican repre- sentation of the species, while the Isthmian have two tubercu- late whorls immediately following the nuclear. Locality. — (Exp’d ’16) Bluff 1, Cercado de Mao. Conus Bonaczyt Gabb Plate 7, Figure 13 Shell small, its sides curved, tapering gradually to the base; shoulder angle rounded, spire low, acute, its sides concave; body whorl ornamented by alternating grooves and flat or slightly rounded ridges, the grooves are marked by longitudinal growth- strie but the ridges are smooth. Length of shell 25, greatest width 11 mm. This species has never before been figured and we have no metatype, but our shells answer to the description of C. Bon- aczyt. Locality. —(Exp’d’16) Zone G, Rio Gurabo at Los Que- mados. Conus Karlschmidti, n. sp. Plate 7, Figure 14 Shell of moderate size, length just twice the width; spire prominent, acute, one-fourth the total length in younger shells, less prominent in adult specimens; post-nuclear whorls about nine, of these the first two and a half are very finely coronate 48 BULLETIN 29 212 and the first four carinate, the subsequent spiral volutions are marked by spiral threads and by arcuate growth-lines; body whorl sharply angulate at the shoulder, from which the sides slope slightly convexly to the base, ornamented from shoulder to base by close-set spiral threads, sub-equal and numbering about thirty-five. Length of largest shell 32, greatest width 16 mm. The young and relatively higher spired shells approach C. tmitator Brown and Pilsbry, but differ in sculpture. This spe- cies is dedicated to Mr. Karl Schmidt, by whom it was found. Localities. — (Exp’d ’16) Bluff 1. Cereado de Mao; Zone E, Rio Gurabo at Los Quemados. Conus Dalli Toula Plate 7, Figure 15 Cf. Conus spec. Toula, Jahrb. der K—K. Geol. Reichsanstalt, Wien, vol. 58, p. 710, pl. 25, fig. 18, 1908. (Fragment). Conus Dallt Toula, Zdem, vol. 61, p. 508, pl. 31, fig. 23 a-d, IgII. Conus (Lithoconus) Dalli Cossmann, Journ. de Conchyliologie. vol. Sie Os Abi, jolls By uss) Yo), Bie yall, dh, ses, 7, Sh Se Shell conic, whorls about nine, the nuclear smooth; subse- quent volutions of the spire marked by three or four impressed spiral lines and arcuate growth-lines. Shoulder of body whorl very sharply carinate; upper portion nearly smooth, lower por- tion ornamented with a varying number of narrow, flat bands tending to alternate with fine spiral threads. Length 23, width 11mm. Collected by Gabb in Santo Domingo. Genus SurcuLA H. and A. Adams Surcula jaqguensis Sowerby Plate 8, Figure 1 Pleurotoma Jaquensis Sowerby, Quart. Jour. Geol. Soc. London, vol. 6, p. 51, 1849. Turris (Surcula) Henekeni Gabb (in part), Trans. Amer. Phil. Soc., vol. 15, p. 207, 1873. Not 7. Hlenekent Sowerby. Pleurotoma Hlenekent Guppy (in part), Quart. Jour. Geol. Soc., vol. 32, p. 526, 1876. Shell with about eight whorls, marked posteriorly by a broad ae ee eee 213 DoMINICAN FossILs-—MAURY 49 sub-sutural fasciole smooth except for arcuate growth-striz, be- low this fasciole the whorls are ornamented with strong, rounded, longitudinal ribs numbering nine on the last volution, and with coarse spiral threads, about six on the penultimate whorl. Length of decollate shell 49, greatest width 17 mm. Our specimens were collected by Gabb in Santo Domingo. Surcula labiata Gabb Plate 8, Figure 2 Clavatula labiata Gabb, Trans. Amer. Phil. Soc., vol. 15, p. 209, 1873. Clavatula labiata Guppy, Quart. Jour. Geol. Soc. London, vol. 32, p. 74, pl. 28, fig. 3, 1876. Shell with nine whorls, the first two nuclear, the third ver- tically ribbed; subsequent whorls with a deep sub-sutural chan- nel beneath which the whorl is angulated, bearing on the carina about ten oblique tubercles which become obsolete on the latter part of the last volution; outer lip rugose internally, very arcu- ate, margin thickened, lip-sinus very deep, situated adove the carina. Length 20, width 9 mm. Localities. — (Exp’d ’16) Zones D and E, Rio Gurabo at Los Quemados. Surcula riomaonts, n. sp. Plate 8, Figure 3 Shell slender, fusiform, with a smooth, glassy two-whorled protoconch, and six post-nuclear whorls; the latter part of the protoconch and the first whorl of the post-embryonic shell are distinctly carinated; subsequent whorls gently convex; longitu- dinal sculpture of rounded ribs, arcuate on the body whorl, and numbering about nine on that and the penultimate volution; the tibs do not cross the narrow sub-sutural channels, which are marked only by rather heavy, raised, slightly arcuate growth- lines; spiral sculpture of fine, uniform raised threads, absent only from the sub-sutural channels; aperture rather long; 50 BULLETIN 29 aI4 canal somewhat reflexed; posterior sinus very shallow, lying close to the suture. Length 13, width 4 mm. Locality. — (Exp’d ’16) Bluff 1, Cercado de Mao. Genus Turris Bolten Turris albida Perry Plate 8, Figures 4-8 Pleurotoma albida Perry, Conch. Expl., pl. 32, fig. 4, 1811. FPleurotoma virgo Vamarck, An. s. Vert., vol. 7, p. 94, 1822. Pleurotoma c ochlearis Conrad, Jour. Acad. Nat. Sci. Phila., 2d ser., vol. I, p. 115, pl. 11, fig. 23, 1848. Pleurotoma haitensis Sowerby, Quart. Jour. Geol. Soc. London, vol. 6, Pp. 50, 1849. Pleurotoma virgo Moore, Quart. Jour., vol. 9, p. 130, 1853. Pleurotoma barretti Guppy, Quart. Jour. Geol. Soc. London, vol. 22, Pp. 290, pl. 17, fig. 6, 1866. Pleurotoma antillarum Crosse, Journ. de Conchyliologie, vol. 13, p. 34, pl. 1, fig. 8, 1865. (Not of d’Orbigny). Turris (Surcula) virgo Gabb, Trans. Amer. Phil. Soc., vol. 15, pp. 206, 207, 1873. Pleurotoma albida Dall, Bull. Mus. Comp. Zoology Harvard Coll., vol, 18, pp. 72, 73, 1889; Trans. Wagner Inst., vol. 3. pt. I, p. 28, pl. 4, fig. 8a, 1890. Pleurotoma albida var. tellea Dall, Bull. Mus. Comp. Zoology Harvard Coll., vol. 18, p. 73, 1889. Pleurotoma albida Brown and Pilsbry, Proc. Acad. Nat. Sci. Phila., P- 343, I9II. Pleurotoma haitensts Cossmann, Journ. de Conchyliologie, vol. 61, pp. 16-18, pl. 2, figs. I-4, 1913. Pleurotoma cf. antillarum Cossmann, Journ. de Conchyliologie, vol. 61, p. 18, pl. 2, figs. 5, 6, 1913. Turris albida Dall, Bull 90 U. S. Nat. Museum, p. 38, pl. 5, fig. 13, pl- 14, fig. 7, 1915. Our Santo Domingo specimens represent five mutations: — (1) Turris albida hattensis (fig. 4), which corresponds with Sow- erby’s type and with Chipolan shells from Florida; (2) 7: alézda Barrett: (fig. 5), a handsome variety described by Guppy from 215 DOMINICAN FosstLsS—MAuURY 51 Jamaica; (3) TZ. albida virgo (fig. 6); (4) TZ. albida tellea (fig. 7); (5) 7: albida antillarum (fig. 8). This species ranges from the Vicksburg Oligocene to the recent. It occurs as a fossil at Bowden, Cumana, Gatun and elsewhere. Localities. — (Exp’d ’16) Bluffs 1 (abundant), 2 and 3, Cercado de Mao; Zones A,B,E,F, Rio Gurabo at Los Quemados; Zone I, Rio Cana at Caimito; between Hato Viejo and Potrero, Rio Amina. Varietal forms: Z. albida tellea, Zone A, Rio Gur- abo; 7. albida virgo, Zone 1, Rio Cana; 7. albida antillarum, Zones A, B, Rio Gurabo; Bluff 1, Cercado de Mao. Genus BorsontiA Bellardi Borsonia varicosa Sowerby Plate 8, Figure 9 Cordiera varicosa Sowerby fide Gabb, Trans. Amer. Phil. Soc., vol, 15, p- 210, 1873. Our specimen was collected by Gabb in Santo Domingo. It has the biplicate columella and characteristic notch of Gorsonza. The present members of this genus are living in the abyssal zone of the Antilles. Genus DRILLIA Gray Drillia fustformis Gabb Plate 8, Figures Io, 11 Derfancia fusiformis Gabb, Trans. Amer. Phil. Soc., vol. 15, p. 209, 1873. Drillia ( Crassispiva) Henekeni Cossmann, Journ. de Conchyliologie, vol. 61, pl. 3, figs. 10, 11, 1913. Not D. Henekent Sowerby. The Gatun analogue of this shell is D. Zookt Brown and Pilsbry. We have several metatypes of the Dominican species. Locality. —(Exp’d ’16) Zone B, Rio Gurabo at Los Que- mados. 52 BULLETIN 29 216 Drillia cercadonis, n. sp. Plate 8, Figure 12 Shell slenderly fusiform, whorls ornamented with longitudi- nal undulating ribs, about nine on the last two whorls, not ex- tending to the posterior suture; the suture is well defined, linear, edged by a sharp, raised spiral thread forming the upper border of the sub-sutural channel which is perfectly smooth except for delicate, microscopic, arcuate growth-lines; spiral sculpture of fine, sub-equal, sub-equidistant raised spiral threads crossing ribs and interspaces. Length 32, width 9 mm. This species can be differentiated from D. fusiformis by its broad, smooth sub-sutural channel, and its finer, more uniform spirals. The Gatun analogue of this species is Dyrillia fusinus Brown and Pilsbry Locality. — (Exp’d ’16) Bluff 1, Cercado de Mao (rare). Drillia venusta Sowerby Plate 8, Figures 13, 14 Pleurotoma venusta Sowerby, Quart. Jour. Geol. Soc. London, vol. 6, p. 50, pl. 10, fig. 7, 1849. Pleurotoma venustum Guppy, Quart. Jour. Geol. Soc., vol. 22, p. 289. 1866, Turris ( Drillia) venusta Gabb, Trans. Amer. Phil. Soc., vol. 15, p. 208, 1873. Pleurotoma venusta Guppy, Quart. Jour. Geol. Soc. London, vol. 32, p- 527, 1876. Pleurotoma venusta Guppy and Dall, Proc. U. S. Nat. Museum, vol. 19, NO. ILI, p. 305, 1896. At first glance our Chipolan specimens of JD). jamazcenstis ap- pear identical with the Dominican shells, but the spiral sculp- ture of the former consists of groovings, and of the latter of raised narrow bands. J. venusta occurs at Bowden and Point- apier, Trinidad. Localities. — (Exp’d ’16) Bluff I, Cercado de Mao (abund- ant); Zones B, D, E, Rio Gurabo at Los Quemados; Rio Amina between Potrero and Hato Viejo. . +t ae 217 DOMINICAN FossILS—MAURY 53 Drillia consors Sowerby Plate 8, Figures 15, 16 Pleurotoma consors Sowerby, Quart. Jour. Geol. Soc. London, vol. 6, Pp- 50, 1849. Fleurotoma consors Guppy, Quart. Jour. Geol. Soc., vol. 22, p. 280, 1866. Turris (Drillia) militaris Gabb, Trans. Amer. Phil. Soc., vol. 15, p. 207, 1873. Not D. militaris Hinds, Proc. Zool. Soc., p. 38, 1843. Pleurotoma consors Guppy, Quart. Jour. Geol. Soc. London, vol. 32, P- 527, 1876. Pleurotoma sp. aff. Pl. alesidota (Dall) var. macilenta Toula, Jahr- buch der K—K. Geol. Reichsanstalt Wien, vol. 61, p. 506, pl. 30, fig..11, 1911. Not alesidota var. macilenta Dall 1889. Drillia consors Brown and Pilsbry, Proc. Acad. Nat. Sci. Phila., p. 345, IQII. Drillia consors Cossmann, Journ. de Conchyliologie, vol. 61, pp. 20-22, pl. 2. figs. 8-14, 1913. This shell has a slight resemblance to D. mzlztaris Hinds from Panama; but is very like D. alstdota macilenta Dall dredged by the Blake off Barbados at 103 fathoms. This slen- der deep sea shell is apparently the descendant of our fossil. D. consors occurs at Bowden, Gatun, Mindi, and Martinique. The type locality is Santo Domingo. Locality. — (Exp’d’16) Zone A, Rio Gurabo at Los Que- mados. (Rather common). Drillia Henekent Sowerby Plate 8, Figures 17, 18 Pleurotoma Hentkert Sowerby, Quart. Jour. Geol. Soc. London, vol. 6, p. 50, pl. 10, fig. 6, 1849. Turris (Surcula) Henekeni Gabb, Trans. Amer. Phil. Soc., vol. 15, p. 207, 1873. Exclude jaguensis from synonymy. ~ Pleurotoma henekeni Guppy, Quart. Jour. Geol. Soc. London, vol. 32, p. 526, 1876. Exclude jaguensts. Not Drillia henekeni Cossmann, Journ. de Conchyliologie, vol. 61, pl. 3, figs. 10, 11, 1913. (=D. _fustformis Gabb). - Colonel Heneken’s name was erroneously thought to be Henekeri when he sent his first collection to the Geological 54 BULLETIN 29 ars Society. This large Drzldia named for him by Sowerby has also been found at Bowden. Localities. —(Exp’d ’16) Bluffs 1 and 3, Cercado de Mao. Drillia squamosa Gabb Plate 9, Figure I Turris (Drillia) squamosa Gabb, Trans. Amer. Phil. Soc., vol. 15, Pp. 208, 209, 1873. Pleurotoma squamosa Guppy, Quart. Jour. Geol. Soc. London, vol. 22 Dei 527eple 2Orutl 20/715) LOO. This striking Drillia is easily recognized by its bold, oblique, sharp-edged ribs, and its squamose surface. We have meta- types and some fine specimens of our own. The shell has not been found outside of Santo Domingo. Locality. — (Exp’d ’16) Zone B, Rio Gurabo at Los Que- mados. Dritha riogurabonis, n. sp. Plate 9, Figure 2 Shell with three smooth nuclear and five post-nuclear whorls, ornamented with rather sharp longitudinal ribs of which there are ten on the body whorl, the last rib being thickened, forming a small varix; the ribs extend from suture to suture; spiral sculpture of faint striz almost obsolete except on the anterior part of the shell; margin of outer lip thin, the external varix ly- ing a short distance back of the lip; posterior sinus deep, nar- row, adjoining the suture; anterior canal bent slightly forward as though deformed. Length of shell 9, greatest width 3.50 mm. Largest specimen measures 11 X 4.50 mm. This species is the same general type as the recent, smaller D. lissotropis Dall, dredged by the Blake among the Antilles in 127-248 fathoms. Locality. —(Exp’d °16) Zone D, Rio Gurabo near Los OQuemados. 219 Dominican Fossirs—MaurRy 5s Drillia cf. magnoliana Olsson We have a single worn shell from Zone I, Rio Cana, near Caimito, which is of the same general type as D. magnoliana Olsson, from the Late Miocene of the Natural Well, Duplin County, North Carolina. Unfortunately, our shell it too eroded for an exact comparison. Drillia losquemadica, n. sp. Plate 9, Figure 3 Shell of moderate size, with nine whorls, the last sometimes bearing a varix; first two volutions smooth, convex, nuclear; subsequent volutions separated by a distinct linear, wavy suture, beneath which is a raised spiral thread bordering the posterior edge of the sub-sutural fasciole; whorls sculptured below the fas- ciole with straight, longitudinal ribs numbering fifteen on the last whorl; the ribs do not cross the fasciole; spiral sculpture of flattened threads (six on the penultimate and about twenty on the ultimate whorl) crossing ribs and interspaces; posterior sinus U-shaped, well-defined in adult shells; outer lip thin with about half a dozen strong liree far within. Length of largest shell 19, greatest width 6.50 mm. Locality. — (Exp’d ’16) Zone D, Rio Gurabo near Los Quemados. Drillia Donalbertonis, n. sp. Plate 9, Figure 4 Shell rather small, solid, with two smooth, nuclear whorls; post-nuclear volutions seven, boldly sculptured with strong, rounded, straight, longitudinal ribs (fifteen on the last whorl) cut short by the broad, conspicuous sub-sutural fasciole which equals nearly one-half of the axial width of the whorls of the spire; spiral sculpture of somewhat stronger threads alternating with groups of finer lines; the spirals extend over the ribs, inter- spaces and sub-sutural fasciole, the posterior edge of which is bordered by aslightly stronger spiral; outer lip thin, with an external 56 BULLETIN 29 220 varix behind it; canal short, reflexed. Length of shell 13.5, greatest width 5 mm. Locality. — (Exp’d’16) Zone D, Rio Gurabo near Los Que- mados. Drillia maontsriparum, n. sp. Plate 9, Figure 5 Shell with three nuclear whorls, the first two smooth, the third ribbed; post-nuclear whorls five, separated by a linear su- ture, beneath which is a prominent spiral ridge forming the up- per border of the sub-sutural channel; the latter is marked by arcuate growth-lines and several fine spiral threads; below the sub-sutural channel the whorls are sculptured by about fifteen tather sharp, straight, longitudinal ribs, several of which may be replaced on the body whorl by a single rounded varix; in the interspaces between the ribs are numerous spiral threads which cross the varix but not the crests of the ribs; the spirals extend to the base of the shell but the ribs terminate below the convex-. ity of the body; outer lip sharp; posterior sinus deep, small, cir- cular. Length 9.5, width 4 mm. Localities. — (Exp'd ’16) Bluff 2 (rare), Bluff 3 (fairly com- mon), Cercado de Mao. Drillia hispantole, n. sp. Plate 9, Figure 6 Shell small, slender, graceful, with eight whorls, the first two smooth nuclear, post-nuclear whorls six, ornamented by close, rounded, slightly arcuate, longitudinal ribs of which there are twelve and a rounded varix on the last whorl; the ribs stop short at the anterior edge of the narrow sub-sutural channel, which is bordered on its posterior edge by an inconspicuous spiral ridge; spiral sculpture of equal, equidistant threads which cross the crests of the ribs as well as the interspaces and varix; posterior sinus deep, narrow, U-shaped; outer lip sharp. Length 9.5, width 3.25 mm. 22h DOMINICAN Fossiirs-——-MauRY shy This shell can be distinguished from D. maontsriparum by its two-whorled protoconch, rounded ribs crossed by the spirals, and U-shaped sinus. Locality. — (Exp’d ’16) Zone D, Rio Gurabo at Los Que- mados. Drillia islalinde, n. sp. Plate 9, Figure 7 Shell with a single varix on the latter half of the body whorl beyond which the sculpture changes from ribbed to sub- cancellate; post-nuclear whorls with narrow, sharp, oblique ribs, fourteen on the penultimate whorl, present on the first half of the body whorl where extra ribs may be intercalated; spiral sculpture of incised lines not crossing the ribs; sub-sutural fas- ciole channeled on the last half of the body whorl and marked by raised growth- lines; outer and inner lips smooth; sinus deep, U-shaped. Length 15, width 5.5 mm. Localities. — (Exp’d’16) Zone G, Rio Gurabo at Los Que- mados; Zone I, Rio Cana at Caimito. Varietal form, Bluff 1, Cercado de Mao. Genus CLAvA Martyn Clava plebeta Sowerby Plate 9, Figure 8 Cerithium plebetum Sowerby, Quart. Jour. Geol. Soc. London, vol. 6, p- 51, 1849. Cerithium plebeium Guppy, Quart. Jour., vol. 22, p. 290, pl. 16, fig. 9, 1866. Cerithium plebeium Gabb, Trans. Amer. Phil. Soc., vol. 15, p. 238, 1873. Cerithium plebetum Guppy, Quart. Jour. Geol. Soc., vol. 32, p. 519, 1876. Clava plebeia Dall, Trans. Wagner Inst. Sci., vol. 3, pt. 2, p. 290, 1892. The type of this species was collected by Heneken in Santo Domingo and named by Sowerby. Later Guppy found it at Bowden, Cumana and Anguilla. 538 BULLETIN 29 Z22 Localities. — (Exp’d’16) Zones B, D, E, F, G, Rio Gurabo at Los Quemados. (Common). Genus MANGILIA Risso Mangilia maoica, n. sp. Plate 9, Figure 9 Shell small, turreted, nuclear whorls four, glassy, the last volution carinated and delicately longitudinally ribbed; post-nu- clear whorls four, strongly carinated in young shells but in the adult the last whorl becomes gently rounded, losing the carina; in some specimens the entire surface is adorned with microscopic, frosty, beaded spiral threads alternating with still finer granular lines, in other shells the beaded spirals are inconspicuous over the general surface, but become progressively stronger on ap- proaching the suture, the one bordering the suture being the strongest; whorls with ten undulating ribs, slightly tuberculate at the carina, extending from suture to suture; outer lip thick- ened in adult, sinus U-shaped, deep. Length 4, width 1.5 mm. Locality. — (Exp’d ’16) Bluff 3, Cercado de Mao. Mangilia Lalonis, n. sp. Plate 9, Figure Io Shell with seven strongly carinate whorls, the first two nu- clear, the apical being invariably set at an angle to the main axis of the shell, and the second strongly keeled and delicately ribbed as in the preceding species; post-nuclear whoris five, adorned with straight longitudinal ribs, extending from suture to suture, and numbering nine on the last whorl; spiral sculpture of frosty, beaded threads, with groups of two or three finer be- tween the larger threads; in adult shells the posterior sinus is in- conspicuous; outer lip not thickened. Length of shell 6, great- est width 2.5 mm. Closely related to 47. maotca, but in this shell the body whorl is strongly carinate, the ribs straight, the sinus inconspic- 223 DOMINICAN FOssILS—MAURY 59 uous. Also like WZ. erttima Bush, living off Hatteras, but the protoconchs are entirely different. Localities. — (Exp’d ’16) Bluff 2 (rare), Bluff 3 (very com- mon), Cercado de Mao. Genus CyTHARA Schumacher Cythara gibba Guppy Plate 9, Figure 11 Cythara gibba Guppy, Proc. U. S. Nat. Mus., vol. 19, no. IIo, p. 306, pl. 27, fig. 9, 1896. Cythara gibba Dall, Trans. Wagner Inst. Sci., vol. 3, pt. 6, p. 1583, 1903. Shell small, with six shouldered whorls, the first two smooth; nuclear; post-nuclear whorls carinated, and with longitudinal ribs (ten on the body whorl), and rather distant spiral threads; posterior sinus very large and deep, U-shaped, lying close to the suture; outer lip much thickened and bearing within near the posterior sinus a single large denticle; anterior canal short. Length of shell 3.9, greatest width 2 mm. Locality. —(Exp’d ’16) Bluff 2, Cercado de Mao. (Very rare). Cythara elongata Gabb Plate 9, Figure 12 Mangilia elongata Gabb, Trans. Amer. Phil. Soc., vol. 15, p. 211, 1873; Jour. Acad. Sci. Phila., vol. 8, p. 351, pl. 46, fig, 34. Cythara elongata Dall, Trans. Wagner Inst. Sci., vol. 3, pt. 6, p. 1583, 1903. Shell small, slender, whorls eight, the first three smooth, nu- clear; post-nuclear whorls ornamented by six narrow, longitudi- nal ribs sub-continuous from whorl to whorl; interspaces broad, shallow; the last rib forms the varix of the outer lip; spiral sculpture absent; posterior sinus deep U-shaped ; aperture nar- row; anterior canal short. Length of shell 6.50, greatest width 2mm. 60 BULLETIN 29 224 Type locality Santo Downe. Also found at Bowden. Localities. —(Exp’d ’16) Bluffs 2 and 3, Cercado de Mao; Zone H, Rio Cana. (Very rare except at Bluff 3). Cythara polygona Gabb Plate 9, Figure 13 Mangilia polygona Gabb, Trans. Amer. Phil. Soc., vol. 15, p. 211, 1873. Shell small, gracefully fusiform, with seven whorls, the first three smooth, nuclear; subsequent four whorls ornamented with about seventeen delicate, slightly sinuous, longitudinal ribs with shallow concave interspaces crossed by very many close, fine, spiral threads; aperture long, rather narrow; inner lip smooth; outer lip with a single ill-defined denticle near the posterior sinus, which is rather shallowly U-shaped. Length of largest specimen II, greatest width 4.5 mm. Our shells appear to be Gabb’s unfigured C. polygona. Locality. — (Exp’d ’16) Bluff 3, Cercado de Mao. (Very abundant; about 200 shells were collected). Cythara caimitica, n. sp. Plate 9, Figure 14 Shell with seven whorls, the first three embryonic; post-nu- clear whorls with narrow, sharp, longitudinal ribs (seventeen or eighteen on the last whorl), the last rib is represented by the varix bordering the outer lip; spiral sculpture of very faint, rather distant, microscopic incised lines; aperture medium; in- ner lip smooth; outer lip with a varix and a sharply defined 1n- ternal longitudinal ridge which terminates in a denticle just an- terior to the shallow posterior sinus. Length 10, width 5 mm. This species resembles the shells referred to C. polygona, but differs as follows: — (1) The spirals are incised lines; (2) the lip has a varix externally and and a longitudinal ridge internally. Locality. —(Exp’d ’16) Zone I, Rio Cana, near Caimito. 225 DOMINICAN Fossirs—MAURY 61 Cythara cercadica, n. sp. Plate 9, Figure 15 Shell fusiform,with seven whorls, the first two nuclear; post- nuclear whorls sculptured with narrow, sharp, nearly straight, longitudinal ribs of which there are nine on each of the last two whorls; interspaces wider, concave; entire surface marked by weak, incised, microscopic spiral lines which cross both interspaces and ribs, cutting the crests of the latter; outer lip broken away; inner lip smooth. Length of shell 14.50, greatest width 5.25 mm. This species is of the general type of Dr. Dall’s C. ¢e7- minula from the Pliocene of Florida. Gabb’s C. heptagona is characterized by its seven promi- nent ribs. Locality. — (Exp’d ’16) Bluff 1, Cercado de Mao. Genus GryPpHostoma Gabb Glyphostoma dentifera Gabb Plate 9, Figure 16 Glyphostoma dentifera Gabb, Proc. Acad. Nat. Sci. Phila., vol. 24, p. 270, pl. 11, fig. 4, 1872. Glyphostoma dentifera Gabb. Trans. Amer. Phil. Soc., vol. 15, p. 210, 1873. The shell figured is a metatype of Gabb’s. This species is the genotype of Glyphostoma. Glyphostoma golfoyaquensts, Ni. Sp. Plate 9, Figure 17 Shell very slender and graceful; whorls ten, the first three nuclear, of these the first two are smooth and convex, the third very sharply carinate; post-nuclear whorls seven, the first two carinate, the remainder gently convex; suture linear; sub-sutural channel marked with extremely fine spiral strize and coarse, con- spicuous, raised arcuate growth-lines; whorls below the sub-su- 62 BULLETIN 29 226 tural channel ornamented with rounded, longitudinal ribs with narrower interspaces, the ribs number thirteen or fourteen on the last two whorls; on the last whorl they tend to fade out and end in a single strong varix behind the outer lip; but additional ribs are intercalated, extending from the convexity of the body down towards the canal; spiral sculpture of uniform threads (four or five on the penultimate whorl) which cross ribs, interspaces, and varix, and extend to the base of the canal, but are replaced in the sub-sutural channel by the much finer striz; outer lip with a thick external varix, margin thin, bearing within six min- ute denticles and one large posterior denticle; inner lip with a strong posterior denticle; columella with minute, sharp, trans- verse plicee; sinus deep, narrow, sub-circular. Length 12, width 4.5 mm. Locality. — (Exp’d ’16) Zone I, Rio Cana, near Caimito. Genus CLATHURELLA Carpenter Clathurella Vendryestana Dall Plate 9, Figure 18 Shell very slenderly fusiform, whorls eight, the first two smooth, the following slightly carinate, the third to the sixth have longitudinal riblets, later whorls only finely cancellated; lip thickened; sinus deep. Length 14, width 4.5 mm. An exquisite shell described from Bowden and now found in Santo Domingo. Locality. — (Exp’d ’16) Zone D, Rio Gurabo at Los Que- mados. Genus CANCELLARIA Lamarck Cancellaria Barretti Guppy Plate 10, Figure 1 Cancellaria Barretti Guppy, Quart. Jour. Geol. Soc. London, vol. 22, p. 289, pl. 17, fig. 11, 1866. Cancellaria reticulata Gabb (in part), Trans. Amer. Phil. Soc., vol. 15, p. 236, 1873. Not C. reticulata Linné. 227 DOMINICAN FossILS—MAuURY 63 Cancellaria Barretti Guppy, Quart. Jour. Geol. Soc. London, vol. 32, p. 520, 1876. This is the preecursor of C. reticulata Linné, living in the Antilles. Its fossil analogues are C. Conradiana Dall, Florida Pliocene, and C. Dariena Toula, Gatun. Guppy’s type was a Bowden shell. Localities. — (Exp’d ’16) Bluffs 1, 2 and 3, Cercado de Mao. Cancellaria Rowelli Dall Plate 10, Figure 2 Cancellaria Rowelli Dall, Proc. U. S. Nat. Mus., vol. 19, no. IIIo, p. 307, pl. 20, fig. 1, 1896. The type measured 25X13 mm. Its nearest ally is C. u- ceolata Hinds, living on the west coast of Central America. Collected by Rowell at Potrero, Rio Amina. Cancellaria epistomifera Guppy Plate 10, Figures 3, 4, 5 Cancellaria Mooret Gabb, Trans. Amer. Phil. Soc., vol. 15, p. 236, 1873. Not C. Mooret Guppy 1866. Cancellaria epistomifera Guppy, Quart. Jour. Geol. Soc. London, vol. 32, p. 520, pl. 28, fig. 9, 1876. Cf. Cancellaria dariena var. Toula, Jahrb. der K-K. Geol. Reichsans- talt, Wien, vol. 58, p. 704, pl. 28, fig. I, 1908. Cancellaria epistomifera Cossmann, Journ. de Conchyliologie, vol. 61, PP- 53, 54, pl. 4, figs. 5, 6, 1913. Our series is divisible into two sets: (1) Protoconch small, first two whorls smooth, the third developing riblets slightly be- fore or simultaneously with the spiral threads; post-nuclear spi- tals strap-like; (2) Protoconch large, first two whorls smooth, the third developing five to seven spiral threads, preceding the riblets by a third of a volution; post-nuclear spirals sharp-edged. Dr. Dall compared (1) with the type and pronounced it the true epistomifera and suggested (2) might be a variety. Toula’s C. dariena var. is very like C. epistomifera, but does not show the characteristic spout of the outer lip. M.Cossmann reports a 64 BULLETIN 29 228 fragment of C. epistomifera from Martinique. The type locality is Santo Domingo. Localities. —(Exp’d ’16) Bluffs 1 and 3, Cercado de Mao; Zone A, Rio Gurabo at Los Quemados. Cancellavia levescens Guppy Plate 10, Figure 6 Cancellaria levescens Guppy, Quart. Jour. Geol. Soc. London, vol. 22, p. 289, pl. 17, fig. 12, 1866. Cancellaria levescens Gabb, Trans. Amer. Phil. Soc., vol. 15, p. 239, 1873. This species can be at once recognized by its characteristic loss of cancellate sculpture on the body whorl. Our shells were collected by Gabb in Santo Domingo. Cancellaria Guppyt Gabb Plate 10, Figures 7, 8 Cancellaria Guppyi Gabb, Trans. Amer. Phil. Soc., vol. 15, p. 236, 1873. This species can be recognized: by its sub-globose form, channeled suture, and fine cancellation. We have several of Gabb’s metatypes with which our shell appears identical though slightly larger and higher-spired. Locality, — (Exp'd ’16) Biuff 1, Gores de Mao. Cancellaria Hlarrisz, n. sp. Plate 10, Figures 9, 10 Shell with eight whorls, the first two nuclear smooth, on the third riblets and spirals appear; the latter increase from striz to flat, narrow bands, on the last two whorls alternating with finer secondary and sometimes tertiary spirals; on crossing the ribs the spirals at the shoulder are nodulose and beautifully cor- onate the whorls; the ribs number fourteen on the body whorl but on earlier volutions are more numerous; columella tri-plicate, the lowest fold bordering the anterior canal; outer lip fluted on 229 DOMINICAN FossILs-—-MAURY 65 the inner edge, lirate within. Length 30, of body whorl 22, width £6 mm. Our shells have a slight resemblance to the recent Oriental C. laticosta Kuster. This, the most beautiful of the Dominican Cancellarias, is named in honor of Professor G. D. Harris. Localities. — (Exp’d ’16) Zones H and I, Rio Cana at Cai- mito. Cancellaria ( Trigonostoma) gurabts, n. sp. Plate 10, Figure 11 Cancellaria brevis Gabb, Trans. Amer. Phil. Soc., vol.15, p. 236, 1873. Not C. brevis Sowerby, Proc. Zool. Soc., p. 52, 1832; Thesaurus Conch is 215 Shell excavately shouldered, widely and deeply umbilicated; whorls five, babylonic, the first two nuclear, smooth, glassy, the apical small, the second enlarging rapidly; the three post-nuclear whorls are cancellated by the intersection of numerous fine ribs and rather strong spiral ridges usually alternating with thinner spiral threads; in addition to the cancellate ornamentation, the penultimate whorl bears three, and the ultimate four, narrow varices somewhat more than twice as thick as the ribs; both ribs, varices, and spirals extend over the strong shoulder carina and across the excavated channel to the suture; they also extend into the funnel-like umbilicus; aperture sub-triangular; outer lip bordered externally by the fourth varix of the body whorl, the lip shows within faint groovings corresponding to the external spiral ridges; inner lip with two thread-like, distinct, rather distant plications. Length 11, width 8 mm. Locality. —(Exp’d ’16) Zone D, Rio Gurabo at Los Que- mados. Cancellaria (Aphera) islacolonts, n. sp. Plate 10, Figure 12, a, b Cancellaria tessellata Gabb, Trans. Amer. Phil. Soc., vol. 15, p, 236, 1873. Not C. ¢essellata Sowerby, Proc. Zool. Soc., p. 51, 1832. 66 BULLETIN 29 230 Shell resembling the recent West Coast C. ¢essellata Sowerby; whorls six, the first two small, smooth, nuclear; post-nuclear whorls elegantly cancellated by the intersection of equal longitu- dinal riblets and revolving ridges; outer lip crenate on the mar- gin, with about fourteen strong liree within; entire inner lip over- spread with a broad, margined callous plate; columella strongly biplicate, the folds often grooved, callus more or less wrinkled. Measurements: 14X7, 19X10 mm. An exquisite and striking shell, abundant in the blue clays. Localities. — (Exp’d ’16) Blufis 2 and 3 (abundant), Cer- cado de Mao; Zone G, Rio Gurabo at Los Quemados; Zone I, Rio Cana at Caimito. Cancellaria (Narona) losquemadica, n. sp. Plate 10, Figure 13 Shell with seven whorls, the first two smooth, glassy, nu- clear, the apical small, the second swollen; five post-nuclear whorls gently convex, abruptly truncate and squarely shouldered posteriorly; longitudinal ornamentation of narrow, varix-like ribs (eleven on each or the iast two whorls) extending from su- ture to suture and intensifying the angulation of the whorls; both the ribs and their interspaces are crossed by spiral threads, ten on the penultimate and twenty on the ultimate whori; aper- ture sub-ovate, rounded posteriorly, produced anteriorly into a short canal which is continuous with the inner lip; the latter has a thin callus through which the spirals of the body are seen; columella with three plications, the two anterior proximate, parallel, the posterior more remote, sub-parallel, weaker; umbil- icus represented by a mere chink. Length 13, width 7 mm. This shell has a slight resemblance to the Gatun C. decaptyx Brown and Pilsbry, but is much more squarely shouldered, with more numerous ribs, and a triplicate columella. Locality. — (Exp’d ’16) Zone E, Rio Gurabo at Los Que- mados. 231 DOMINICAN FOSSILS—MAURY 67 (B.) SUPER-FAMILY RHACHIGLOSSA Genus OLIvA Bruguiére Oliva cylindrica Sowerby Plate 10, Figures 14, 14a Oliva cylindrica Sowerby, Quart. Jour. Geol. Soc., vol. 6, p. 45, 1849. Oliva reticularis Guppy, Quart. Jour. Geol. Soc., vol. 22, p. 288, 1866, Not reticularis Lamarck. Oliva cylindrica Gabb, Trans. Amer. Phil. Soc., vol. 15, p. 215, 1873. Oliva cylindrica Guppy, Quart. Jour. Geol. Joc., vol. 32, p. 526, 1876. Oliva cylindrica Dall, Trans. Wagner Inst., vol. 3, pt. 6, p. 1583, 1903. Oliva cylindrica Cossmann, Journ. de Conchyliologie, vol. 61, p. 57, pl. 5, figs. 2, 3, 1913. A comparison of specimens shows our fossils to be very close to the recent O. reticularis and O. litterata, but rather heavier, larger and broader. Guppy reported O. cylindrica from the Isthmus, Cumana, Barbuda, Trinidad (Caroni Series); and Dall and Cossmann from Bowden. The type was collected by Heneken in Santo Domingo. Localities. — (Exp’d ’16) Bluff 1, Cercado de Mao; Zone G, Rio Gurabo at Los Quemados; Zones H and I, Rio Cana at Caimito. Oliva Cristobalcolont, n. sp. Plate 10, Figure 15 Shell very slender, spire high, suture channeled; whorls eight, the first three nuclear, the initial extremely small, the second slightly larger, the third increasing suddenly; subsequent whorls sloping evenly to the tapering body; inner lip with many short, transverse, posterior plications and five or six longer anterior folds. Length 32, width 11.5 mm. This species is distinguished from our other Olives by its very slender form, high spire, and extremely sloping shoulder. It is much narrower and more tapering than young shells of O. cylindrica, reticularis, or litterata. 68 BULLETIN 29 232 Localities. —(Exp’d ’16) Zones H and I, Rio Cana at Caimito. Oliva brevispira Gabb Plate 10, Figures 16, 17 Oliva brevispira Gabb, Trans. Amer. Phil. Soc., vol. 15, p. 215, 1873. Oliva Gtraudt Cossmann, Journ. de Conchyliologie, vol. 61, p. 56, pl. 5, figs. 4-8, 1913. Exclude synonymy. We have a large series agreeing with our metatype of Gabb’s O. brevispira and with Cossmann’s figures of O. Gzraudz from Martinique. The latter only appears a trifle broader shouldered than the Dominican shells. O. brevispiva has a characteristic short spire; round, glassy, button-like protoconch; and inner lip with fifteen to sixteen plications. Localities. —(Exp’d ’16) Bluffs 2 and 3, Cercado de Mao (very abundant); Zone G, Rio Gurabo at Los Quemados; Zones H and I, Rio Cana at Caimito (abundant). Genus OLIVELLA Swainson Olivella muticoides Gabb Plate 11, Figure 1 Oliva muticoides Gabb, Trans. Amer. Phil. Soc., vol. 315, p. 215, 1873. Olivella nutica variety muticoides Dall, Trans. Wagner Inst. Sci., vol. 3, pt. I, p. 45, 1890. This species is closely akin to the Miocene—Recent O. mu- tica Say, which is living on the Monte Cristi beach. It is also near to O. Boussaci Cossmann, from Martinique. Gabb’s spe- cies has never been figured, but we have metatypes for compari- son. The shell has not been found outside of Santo Domingo. Localities. — (Exp’d ’16) Zone G, Rio Gurabo at Los Que- mados; Zone H, Rio Cana at Caimito. Olivella muticotdes variety canaliculata Gabb Plate 11, Figure 2 Oliva canaliculata Gabb, Trans. Amer. Phil. Soc., vol. 15, p. 215, 1873. 233 DOMINICAN FossILS—MAuRy 69 This shell intergrades with O. muticozdes, but our seven meta- types from Gabb show it is typically slightly broader, with a lower, more deeply channeled spire. It measures about 167 mm. O. canaliculata has never been figured heretofore. It has not been reported except from Santo Domingo. Locality. — (EHxp’d ’16) Bluff 2, Cercado de Mao. Olivella indivisa Guppy Plate 11, Figure 3 Oliva oryza Gabb, Trans. Amer. Phil. Soc., vol. 15, p. 215, 1873. Not oryza Lamarck. Olivella indivisa Guppy, Proc. U. .S. Nat. Museum, No. I1I0, vol. 19, p- 308, pl. 30, fig. 10, 1896. Our Dominican shells appear slightly more convex than Guppy’s Bowden type, but otherwise coincide with his figure of O. tndivisa. This shell is the preecursor of the recent O. oryza (=nxzvea Gmelin). Locality. — (Exp’d ’16) Bluff 3, Cercado de Mao. (Ex- tremely abundant). Olivella Sanctt-Dominici, n. sp. Plate 11, Figure 4 Shell elongate-ovate, highly polished, spire short, blunt; whorls about four, the apical button-like, the second nearly cov- ered by the third; last whorl very cylindrical; columellar callus, thin, anterior plications two, distinct, followed by a number of delicate transverse strie. Length 12, width 5 mm. This species appears to be the ancestor of O.7aspidea Gmelin, now living on the Monte Cristi beach, but the spire is higher and the body more ventricose in the recent shell. Dall cites a Bowden Odivella near jaspidea, possibly like ours. Locality. —(Exp’d’16) Zone D, Rio Gurabo at Los Que- mados. 70 BULLETIN 29 234 Genus MARGINELLA Lamarck Marginella contformis Sowerby, Plate 11, Figures 5, 5a Margtinella contformis Sowerby, Quart. Jour. Geol. Soc. London, vot. 6, p. 44, 1849. Marginella contformis Guppy, Quart, Jour. Geol. Soc., vol. 22, p. 288, pl. 17, fig. 2, 1866. Marginella contformis Gabb, Trans. Amer. Phil. Soc., vol. 15, p. 221, 1873. Marginella contformts Guppy, Quart. Jour. Geol. Soc. vol. 32, p. 528, 1876. Vee contformis Guppy and Dall, Proc. U. S. Nat. Mus., vol. 19, NO. IIIO, p. 309, 1896. ? Marginella contformis Brown and Pilsbry, Proc. Acad. Nat. Sci. Phila., p. 348, pl. 24, fig. 12, 1911. This is the commonest Dominican Warginella. Large shells measure 25 X13.5 mm. Guppy’s Cumana specimen is 7. cincta Kiener, and that from the Caroni series, Trinidad, is Persicula near obesa. It does, however, occur at Bowden and Gatun; but Brown and Pilsbry’s figure of a variety also from Gatun is re- markably unlike Guppy’s illustration of JZ. conzformzs. The Dominican fossil is undoubtedly the ancestor of the shorter and more cylindrical 47. guttata Dillwyn, living in the West Indies. Localities. —(Exp'd ’16) Bluff 1, Cercado de Mao; Zones D and E, Rio Gurabo at Los Quemados. Marginella Christineladde, n. sp, Plate 11, Figure 6 Shell slender, elongate, four-whorled, smooth and _ polished, spire very low; aperture nearly as long as the shell, narrow; margin of outer lip thickened, smooth within; inner lip of adult shells with a thin callus extending to the tip of the spire, colum- ella with four plications, the three anterior oblique, the posterior transverse, lying at the center of the inner lip. Length of largest shell 19, width 9 mm. 235 DOMINICAN Fossirs—Maury 71 The nearest fossil ally is the larger, Pliocene, 17. limonensts Dall, from Costa Rica. The recent analogue and probable de- scendant is 47. oblonga Swainson, living off the Bahamas. This species is named in honor of Mrs. Christine-Ladd Franklin of New York City, Chairman of the Sarah Berliner Fel- lowship Committee. It is a slight token of appreciation of her confidence from the beginning in the writer, and in the success of the Santo Domingo Expedition. Locality. — (Exp’d ’16) Zone B, Rio Gurabo at Los Que- mados. Marginella maoensis, n. sp. Plate 11, Figure 7 Shell oblong-ovate, resembling J7. aficina Menke in form, but about half as large, with a slightly more prominent spire, and with the body-whorl convex, not medially contracted as in apicina. Whorls four, suture obscure; aperture narrow, widen- ing anteriorly and somewhat abruptly expanding posteriorly; outer lip heavily thickened except anteriorly, closely and finely crenulate within; columella with four plications, the two anter- ior stronger, longer, oblique, the two posterior weaker, nearly transverse. Color pattern consisting of two narrow, well-de- fined dark-gray bands, one almost central, the other anterior, thus dividing the body whorl into three subequal zones; no spots are present. Length 10, width 6 mm. Locality. — (Exp’d ’16) Bluff 3, Cercado de Mao. (Abun- dant). Marginella Sowerbyt Gabb Marginella Sowerbyi Gabb, Trans. Amer. Phil. Soc., vol. 15, p. 221, 1873. Marginella Sowerbyt Guppy, Quart. Jour. Geol. Soc. London, vol. 32, p. 528, pl. 28, fig. 1, 1876. Characterized by a high spire and grooved columellar folds. The shell measures 15 X11.50. Collected by Gabb in Santo Do- mingo. 72 BULLETIN 29 236 Marginella hispaniolana, n. sp. Plate 11, Figure 8 Shell small, short-biconic, smooth and polished, with four whorls; suture indistinct, spire enameled; outer lip bordered by a narrow, thick band, sharply lined off from the body whorl; this band continues around the base of the shell, bordering and reinforcing the canal; margin of outer lip strongly crenulate, bearing about fifteen denticles; inner lip with four sharp, prom- -inent folds, the two anterior being stronger, longer, and more oblique, the two posterior shorter, nearly transverse. Length of shell 8, aperture 6, greatest width 5 m. m. This species is smaller and more squarely shouldered than M. Sowerbyi. It recalls M. Newmanit Dall from the Tampa si- lex bed. Locality. —(Exp’d ’16) Zone G, Rio Gurabo at Los Que- mados. Marginella latissima Dall Marginella lattsstma Dall, Proc. U. S. Nat. Mus., vol. 19, no. 1110, Ppp. 308, 309, pl. 29, fig. 11, 1896. Found by Gabb in the Costa Rica Pliocene and collected by Bland in Santo Domingo. Marginella amina Dall . Marginella amina Dall, Proc. U. S. Nat. Mus., vol. 19, no. IrI0, p. 309, pl. 29, fig. 15, 1896. Collected by Bland at Potrero, Rio Amina. Marginella domingoensts Dall Marginella domingoenses Dall, Proc. U. S. Nat. Mus., vol. 19, no. IIIO, p. 310, 1896. Collected on an island in Lake Henriquillo, southern Santo Domingo, and also by Bland at Potrero, Rio Amina. 237 DoMINICAN FossiLs-—-MAuRY “I Ww Marginella (Persicula) cercadensis, n. sp. Plate 11, Figure 9 Shell small, ovate, Bulliform, spire depressed, enameled; margin of outer lip thickened, sharply lined off from the body whorl by a narrow sulcus; base of shell keeled, the keel being continuous with the thickened margin of the outer lip, which is minutely crenulate within; inner lip with three more prominent, anterior plications and five weaker posterior to these, eight in all, becoming obsolete posteriorly; the second , anterior pli- cation is very strong, grooved on top, appearing double. The body whorl is delicately and elegantly ornamented with fourteen regular, revolving, chestnut-brown lines, not visible except with alens. Length 6.5, width 4.25 mm. This species is about the size and form of P. catenata Mont. living at Monte Cristi, but the color markings are different and the margin of the lip in that species is not so thickened nor has the base the strong keel. The markings of our fossils are some- what like those of P. multilincata and interrupta-lineata, but both these are much larger. J/. odesa is still larger and more convex, while chrysomelina is spotted, not lined nor keeled. Locality. — (Exp’d’16) Bluff 3, Cercado de Mao. (Abun- dant), Genus Lyria Gray Lyria pulchella Sowerby Plate 11, Figures 10, loa Voluta pulchella Sowerby, Quart. Jour. Geol. Soc. London, vol. 6, p. 46, pl. 9, fig. 4, 1849. Voluta soror Sowerby,./d. p. 46. Lyria pulchella Gabb, Trans. Amer. Phil. Soc., vol. 15, p. 219, 1873. Voluta pulchella Guppy, Quart. Jour. Geol. Soc. London, vol. 32, p. 528, 1876. Lyria pulchella Dall, Trans. Wagner Inst. Sci., vol. 3, pt. 1, p. 84, pl. 4, fig. 3. 1890. Lyria pulchella Dall, Bull. 90, U. S. Nat. Museum, p. 58, pl. 10, fig. rr. IQI5. 74 BULLETIN 29 238 After examining the types, Guppy stated that Sowerby’s V. sorory was undoubtedly synonymous with lV. pulchella. We have a fine series of this handsome and abundant shell. A single specimen has been found by Dall in the Tampa silex beds. Localities. —(Exp’d ’19) Bluff 1 (Abundant), Bluff 3, Cerca- do de Mao; Zones A, B, D, E, F, Rio Gurabo at Los Quema- dos; Rio Amina between Potrero and Hato Viejo. Genus Mirra Lamarck Mitra Henekent Sowerby Plate 12, Figures 5, 5a Mitra Henekeri Sowerby, Quart. Jour. Geol. Soc. London, vol. 6, p. 46, pl. 9, fig. 5, 1849. Mitra Henekeni Gabb, Trans. Amer. Phil. Soc., vol. 15, p. 219, 1873. Mitra Flenekent Guppy (in part), Quart. Jour. Geol. Soc. London, vol. 32, p. 528, 1876. Sowerby’s type was immature and decollate. The adult shell has ten whorls and measures 5615.5 mm. A character- istic is the slight truncation of the whorls at the suture, The young resemble 7. filosa. We have a large series of this fine (/z¢va, which also occurs in the Caroni Series, Trinidad, and at Bowden. Localities. — (Exp’d ’16) Zones A, B, E, F, Rio Gurabo at Los Quemados; Zones H and I, Rio Cana at Caimito; Bluff 1, Cercado de Mao. Mitra longa Gabb Plate 11, Figures 11, Ila Mitra longa Gabb, Trans. Amer. Phil. Soc., vol. 15, p. 219, 1873. Mitra longa Brown and Pilsbry, .Proc. Acad. Nat. Sci. Phila., p. 346, jolls Aak, see, aie ey), This shell is easily differentiated from M/. Henekent by its slenderer form, greater number of columellar plications, and the more reticulated aspect of the surface between the main revolv- 239 DOMINICAN FossILs—MAURY 75 ing ridges. A decollate shell measures 6313 mm. We have metatypes from Gabb for comparison with our own specimens. The species has been also found at Gatun. Localities. —(Exp’d ’16) Bluff 1, Cercado de Mao; Zone I, Rio Cana at Caimito. Mitra quemadica, n. sp. Plate 11, Figure 12 Shell fusiform, biconic, suture indistinctly bordered by a sub-nodulose band; entire surface ornamented with revolving cords, five on the penultimate, and fifteen on the ultimate whorl; these cords are equidistant except just below the suture, where the interspace is double the normal; they are crossed by much weaker longitudinal growth-lines; aperture elliptical; col- umella with three strong posterior folds and one faint anterior one; margin of outer lip serrate. Length 28, width 11 mm. In some respects this shell agrees with Gabb’s description of his unfigured 7. rudis, but our shell is narrower and has many instead of a few revolving spirals. Locality. — (Exp’d ’16) Zone D, Rio Gurabo at Los Quemados (Rare). Mitra titan Gabb Plate 11, Figures 14, I4a Mitra titan Gabb, Trans. Amer. Phil. Soc., vol. 15, p. 220, 1873. Mitra titan Dall, Trans. Wagner Inst. Sc., vol. 3, pt. I, p. 94, 1890; pt. 2, p. 229, 1892. This shell is strikingly like the Jacksonian Eocene 7. M/illing- tont, but the latter is slenderer with a more elongate last whorl. Doubtless the Dominican shell is the descendant of the earlier species which lived in the Mississippi embayment. We have a metatype of W/. tztan. The type measured 15245 mm. Gabb’s M. symmetricus may be the young of ¢ztan. 76 BULLETIN 29 240 Mitra tortuosa Gabb Plate 11, Figure 13 Mitra tortuosa Gabb, Trans. Amer. Phil. Soc., vol. 15, p. 220, 1873. Shell with about twelve whorls, the first two nuclear; later whorls sculptured by a dozen sharp ribs extending from suture to suture, with concave interspaces marked by spiral incised lines. The shell measures 28X10mm. We have several meta- types for comparison. Locality. —(Exp’d’16) Zone E, Rio Gurabo at Los Que- mados. Mitra Berlineri, n. sp. Piate 11, Figures 15, 15a Shell large, solid, typically mitriform, spire elevated; slightly less in length than the aperture; whorls seven and a half, the first two smooth, the third and all the subsequent volutions sculptured by many sub-equal, sub-equidistant, somewhat wavy and irregular alternating furrows and ridges; and by unequal, irregular, broad, more or less obsolete, longitudinal plications which extend from the suture to the base of the whorls; suture distinct with a rather ill-defined sub-sutural band; aperture large, not contracted anteriorly. Columella encrusted with a thick callus, and bearing four strong plications; canal nearly straight. Length of shell 83, width 24 mm. This large Mitra rivals MW. titan in size, but is unlike any recent or fossil species from the southeastern coast of America or from the Antilles. I take the greatest pleasure in naming this splendid Mztra in honor of Mr. Emile Berliner, of Washington. D. C., asa slight token of appreciation of his generous gift of the Sarah Berliner Foundation, which has made this work possible. Locality. — (Exp’d ’16) Bluff 1, Cercado de Mao, Mitra (Strigatella?) perturbatrix, n. sp. Plate 14, Figures 1, 2 Shell slender, somewhat Columbelliform, spire a trifle shorter 241 DoMINICAN Fossits—MAuURY 7 than the aperture; suture distinct; whorls eight, the first two smooth, nuclear; post-nuclear whorls slightly convex, ornament- ed with weak, equidistant longitudinal plications, about twenty on each of the last two whorls; the plications are strongest over the convex portion of the volutions and fade out near the su- tures; aperture narrowly elliptical, inner lip with a callus; colum- ella with three sharp anterior and two weaker posterior plications; outer lip thickened with a stout, marginated external band, marked by an internal posterior Strombinoid notch and showing traces of obsolescent crenulations within, not lirate. Length of shell 20, greatest width 8.5 mm. Locality. — (Exp’d ’16) Zone D, Rio Gurabo at Los Que- mados. Genus PLocHELZA Gabb Plochelea crasstlabra Gabb Plate 14, Figure 3 Plochele@a crassilabra Gabb, Proc. Acad. Nat. Sci. Phila., vol. 24, p. PAp/e Ol, wae, sober, Ky, ksh. Plochel@a crassilabrum Gabb, Trans. Amer. Phil. Soc., vol. 15, p. 216, 1873. Shell Oliva-form, tapering anteriorly, spire low, suture ob- solete, whorls about eight; aperture narrow; inner lip crossed by about six slightly oblique, weak, linear plications; outer lip much thickened at its center; columella recurved, sinus deep, oblique. Length of shell 35, greatest width 17 mm. The above description is of a metatype from Santo Domin- go. This species is the genotype of Plochelea. Genus TURRICULA Klein Turricula (Costellaria) Bullennewtont, n. sp. Plate 12, Figures 6, 6a Shell elongate, turreted, coronated; whorls eight, each or- namented by nine sharp-edged, longitudinal riblets, terminating at the shoulder in spinose tubercles, not extending to the suture, 78 BULLETIN 29 242 coronating the shoulder; surface covered with close, coarse, even spiral threads; aperture narrow, outer lip sharp, lirate far within; inner lip with a light callus, columella with two distinct, slightly oblique plications. Length of shell 13, greatest width 5.25 mm. This interesting shell is apparently nearest akin to such forms as C. cadaverosa Reeve and C. exasperata Gmelin, living in the Polynesian and Red Sea regions. The whole genus now is characteristically Polynesian; but our shells so resemble spe- cimens of C. cadaverosa from the Philippines that there can be no doubt of their belonging to the same genus. An allied genus is Lapparia Conrad, represented by L. du- mosa in the Jacksonian Eocene of Mississippi. I take great pleasure in naming this species in honor of Dr. R. Bullen Newton of the British Museum. Localities. —(Exp’d ’16) Zones D and E, Rio Gurabo at Los Quemados. Genus Fusus Lamarck Fusus Henekeni Sowerby Plate 12, Figure 1 Fusus Henekeri Sowerby, Quart. Jour. Geol. Soc. London, vol. 6, p. 49, 1849. Fusus Henekenit Gabb, Trans. Amer. Phil. Soc., vol. 15, p. 204, 1873. Fusus Henekeni Guppy, Geol. Mag. London. p. 439, 1874; Quart. Jour. Geol. Soc. London, vol. 32, p. 524, pl. 28, fig. 6 (type), fig. 2 (var- iety Hattensts), 1876. Fusus Henekeri Dall, Trans. Wagner Inst. Sci., vol. 3, pt. 6, p. 1584, 1903. Fusus Henekenit Grabau, Smithsonian Misc. Coll., vol. 44, no. 1417, p. 19, T904. This fine species is characterized by its convex whorls with rounded ribs (nine on the body whorl), and primary, secondary and tertiary spirals. Our largest shell measures 90X24 mm. Guppy has given an excellent figure of Sowerby’s type, collected by Heneken. The species also occurs at Bowden. Professor Grabau has noted the strong resemblance of /. 243 DOMINICAN Fossirs—MaAurRy 79 Henekent to F. eucosmium Dall, living in the Antilles. Doubt- less our fossil is the ancestor of this more slender, recent shell. Localities. — (Exp’d’16) Bluffs 1 and 3, Cercado de Mao; Zones A and B, Rio Gurabo at Los Quemados; Zone H, Rio Cana at Caimito. Fusus Henekeni variety hattensis Sowerby Plate 12, Figure 2 Fusus Haitensis Sowerby, Quart. Jour. Geol. Soc. London, vol. 6, p. 49, 1849. Fusus HHaitensis (2?) Gabb, Trans. Amer. Phil. Soc., vol. 15, p. 204, 1873. Fusus eee Guppy, Geol. Mag. London, p. 439, 1874. Fusus Henekeni variety haitenses Guppy, Quart. Jour. Geol. Soc. Lon- don, vol. 32, p. 524, pl. 28, fig. 2, 1876. Fusus hattensts Grabau, Smithsonian Misc. Coll., vol. 44, no. 1417, p. 20, 1904. Shell resembling /. Henekent and grading into that species, but differing as follows: —(1) The whorls are angulated, cari- nated, and flattened posteriorly; (2) the ribs do not continue to the suture; (3) the spirals are more distant, not crowded; (4) the ribs often become obsolete on the later whorls. This accel- erated gerontism appears to be an individual characteristic. Localities. — (Exp’d’16) Zones A, B, D, Rio Gurabo at Los Quemados; Bluff 3, Cereado de Mao; Zone I, Rio Cana at Caimito. Fusus Hlenekent variety Veatcht, n. var. Plate 12, Figure 3 Shell resembling 7. Henekenz, but differing in the following respects: — (1) The structure of the shell is much lighter so that a specimen of equal size is much less ponderous and thinner; (2) the spirals are less crowded and less sharply ridged; (3) the ear- lier whorls have about eight rounded, longitudinal ribs to a volu- tion, but they begin to fade out on the third whorl from the last; (4) the last two whorls are without ribs, are ventricose, not Printed March 19, 1917 80 BULLETIN 29 244 carinated, slightly channeled beneath the suture; (5) inner lip with a mere wash of callus, not rugose except posteriorly,,where the spirals of the body whorl show through the Maa callus. Length 88, width 24 mm. In general aspect /. Henekeni Veatchi recalls 7. longicau- datus Bory, now living off Ceylon. In F. Henekent the ribs persist, in Henekent hattenszs they tend to become obsolete, in --. Henekent Veatcht this gerontic character is greatly intensified. This fine Fusus is named in honor of Mr. Arthur C. Veatch of London, England, as a token of friendship, and appreciation of his great assistance in this work. Locality. — (Exp’d ’16) Zone H, Rio Cana at Caimito. Genus FAscroLARIA Lamarck Fasciolaria semtstriaia Sowerby Plate 13, Figure 1 Fasciolaria semtstriata Sowerby, Quart. Jour. Geol. Soc. London, vol. 6, p. 49, 1849. Fasciolaria intermedia Sowerby, /d. vol. 6, p. 49. 1849. Fasciolaria semtstriata Guppy, Quart. Jour. Geol. Soc., vol. 22, p. 288, pl. 16, fig. 12, 1866. Fasciolaria semisiriata Gabb, Trans. Amer. Phil. Soc., vol. 15, p. 216, 1873. Fasciolaria semistriata Guppy, Geol. Mag. London, p. 438, 1874. Fasciolaria intermedia Guppy, Quart Jour Geol. Soc., vol. 32, p. 523, 1876. Fasctolaria semtstriata Dall, Trans. Wagner Inst. Sci., vol. 3, pt. I- pp. IOI, 102, 1890; pt. 6, p. 1583, 1903. Sowerby compared this species to the recent Australian /. Justformis Valenciennes, which it resembles in general form; but its real affinities are with the West Indian /. fu/ifa Linné. There seems no doubt that Guppy was correct in regarding Sowerby’s /. intermedia as synonymous with F. semistriata. Sowerby described /. ztermedia as six-whorled, the first smooth, 245 DomINIcAN FossiLs--MAuRY 81 papilliform, the second, third and fourth tuberculate, the rest ventricose, smooth. This would apply to specimens of semzstrzata but not to the zzzermedia of Gabb and others. F. semistriata has also been reported from Bowden and Auguilla. Localities. — (Exp’d ’16) Bluff 1, Cereadode Mao (Abun- dant); Zone G, Rio Gurabo at Los Quemados. Fasciolavia Kempt Maury Plate 12, lars 4 Fasciolaria intermedia Gabb, Trans. Amer. Phil. Soc., vol. 15, p. 217, 1873. Not Fasciolaria intermedia Sowerby, Quart. Jour. Geol. Soc. London, vol. 6, p. 49, 1849 (= F. semistriata Sowerby.) Siphonalia Kempi Maury, Bull 21. Amer. Paleont., vol. 4, p. 138, pl. 5, fig. 5, I910. Fasciolaria intermedia Brown and Pilsbry, Proc. Acad. Nat. Sci. Phila., p. 506, 1912. Not of Sowerby. This species was incorrectly identified by Gabb as Sowerby’s intermedia. Thetrue /. tntermedia has the whorls (after the fourth ) smooth, while those of Gabb’s shell, as shown by our figure, are tuderculate. By accident a fragmentary shell was mixed with Chipola material and erroneously described by the writer as a Szphonalia. Fasciolaria Kempt is a small member of the /. gzgantea stock- Its Gatun analogue is /. Gorgasiana Brown and Pilsbry. Our specimens were collected by Gabb in Santo Domingo, and the species is also found at Bowden. Fasciolaria carminamaris, n. sp. Plate 13, Figure 2 Shell large, very handsome, whorls convex, not carinate, concavely flattened posteriorly; ornamented with thirteen rounded tubercles on the shoulder, cut by an ill-defined revolving sulcus so as to appear double. The center of the sulcus is occupied by a granular thread; in addition there is a second, anterior row of smaller rounded nodules lying close to the suture of the following volution, and on the body whorl along the continuation of the sutural line; the penultimate whorl bears ce iS) BULLETIN 29 246 nineteen and the last whori twenty of these nodules; an ill-defined third row of still smaller nodules borders the convex portion of the body whorl. The entire shell is sculptured with numerous rather irregular, interrupted, very granulose threads and ridges, more or less alternating with weaker spirals; aperture medium; outer lip strongly lirate within, the lire being linear not granulose; inner lip with a callus thickest anteriorly; columella with one very strong anterior plication, a weaker median, and a sugges- tion of a third faint, posterior plication; canal rather long, nearly straight. Length 93, width 40 mm. Locaiviv, — (bh xpid) 16) — lui nr Cencadodey Wiaoy iiGx single shell. ) Genus Latirus Montfort Latirus infundibulum Gmelin Plate 13, Figure 3 x Latirus infundibulum Gmelin, Lamarck, Anim. sans Vert. (ed. Desh.) vol. 9, p. 386: Reeve Conch. Icon., Turbinella, No. 3. Latirus infundibulum Guppy, Quart. Jour. Geol. Soc. London, vol. 22, p. 288, 1866; Geol. Mag. London, p. 438, 1874. Latirus infundibulum Gabb, Trans. Amer. Phil. Soc., vol. 15, p. DG, WIR: Turbinellus (Latirus) infundibulum Guppy, Quart. Jour. Geol. Soc. London, vol. 32, p. 523, 1876. Latirus infundibulum Dall. Bull. 37, U. S. Nat. Mus., p. 112, 1889; Trans. Wagner Inst. Sci. vol. 3, pt. 6, p. 1584, 1903. A recent shell has but ten primary spirals on the convex part of the body whorl while the fossil has sixteen; the ribs are equal in number. The fossil measures 55x18. The recent 57X19 mm. A larger series might show that the ancestral form should have a distinctive name, varietal or specific. If so, guvabensis would be appropriate. This species occurs at Bowden, and in the Caroni Series, Trinidad. The recent form is living in rather deep water from the Tortugas to Santa Lucia. Localities.—(Exp’d ’16)—Zones A, B, E, Rio Gurabo at Los Quemados. 247 DOMINICAN FossILsS—Maury 83 Latirus fusiformts Gabb Plate 13, Figure 4 Latirus fusiformis Gabb, Trans. Amer. Phil. Soc., vol. 15, p. DiGi, Isy/er, We have a number of specimens of a Latirus agreeing with Gabb’s description of this unfigured species. Localities —(Exp’d ’16) Zone D, Rio Gurabo at Los Quemados; Bluff 2, Cercado de Mao. Latirus extlis Gabb Plate 14, Figure 4 Latirus exilis Gabb, Trans. Amer. Phil. Soc., vol. 15, p. 217, 1873. Our shell corresponds exactly with Gabb’s description of this striking species, marked by the small aperture and canal twisting to the right upon the pillar. ME Ocaliny ex UC Nao) Zone B, Rio Gurabo at Los Quemados. Genus Xancus Bolten Xancus validus Sowerby Plate 13, Figure 5 2 Turbinellus validus Sowerby, Quart. Jour. Geol. Soc. London, vol. 6, Pp. 50, 1849. Turbinella valida Gabb, Trans. Amer. Phil. Soc. 15, p. 218, 1873. Turbinellus validus Guppy, Geol. Mag. London, p. 438, 1874; Quart. Jour. Geol. Soc. London, vol. 32, p. 523, 1876. Turbinella scolymus Tryon (in part) Manual Conch, vol. 4. p. 70, 1882. Not the recent shell. Turbinella validus Dall, Trans. Wagner Inst. Sci., vol. 3, pt. I, p. 99, I8go. Turbinella scolymus Dall(in part) Trans. Wagner, Inst. Sci., vol. 3, Dies IL [Do Oyy Utsie(on The smoother species X. Wilsonz, from the Vicksburg is the ancestor of X. validus, while the recent X. scolymus is its descendant. We have fine shells of validus that Gabb collected in Santo Domingo. Guppy reported it from the Caroni Series, Trinidad. Xancus procvoideus, n. sp. Plate 14, Figure 18 Turbinella ovoidea Gabb, Trans. Amer. Phil. Soc., vol. 15, p. 218 84 BULLETIN 29 248 1873. Not 7. ovoidea Kiener, Reeve Icon., fig. 23. Turbinellus ovoideus Guppy, Geol. Mag., p. 438, 1874 (in part;) Quart. Jour. Geol. Soc. London, vol. 32, p. 523, 1876. Turbinella ovoidea Tryon (in part,) Man. Conch. vol. 4, p. 70, 1882. Not the recent shell. Our recent shells of X. ovotdea collected by the Hartt expe- dition at Bahia, Brazil, show the spire is spirally striate, zof costate. In the fossils the spire is strongly tuberculately costate for about five whorls,and the three columellar plications are decidedly heavier. Length 178, width 71 mm. We collected a number of specimens and have also some very fine ones sent by Gabb. Localities. —(Exp’d ’16)—Blufis 1 and 3, Cercado de Mao. Genus Vasum Bolten Vasum hattense Sowerby Plate 13, Figure 6 Turbinellus Haitensis Sowerby, Quart. Jour. Geol. Soc. London. vol. 6, p. 50, 1849. Vasum Haitensis Gabb, Trans. Amer. Phil. Soc., vol. 15, p. 218, 1873. Turbinellus Haitensis Guppy, Geol. Mag. London, p. 438, 1874. Turbinelius Haitensis Guppy, Quart. Jour. Geol. Soc. London, vol. 32, [De Gag) jolly Aro), ies, 3, ISO, Vasum haitense Dall, Trans. Wagner Inst. Sci., vol. 3, pt. I, p. 100, 1890. Specimens of Vasum engonatum Dall from the Chipola River, Florida are very close to Guppy’s figure of Sowerby’s type of V. haitense and to our Santo Domingo specimens. The most striking differences are (1) the very squamose surface and (2) the greater flatness of the later whorls in V. haztense. Localities. — (Exp’d’16) Zones A, B, E, Rio Gurabo at Los Quemados. Vasum dominicense Gabb, variety gurabicum, n. var. Plate 13, Figure 7 Vasum Dominicensis Gabb, Trans. Amer. Phil. Soc., vol. 15, p. 218, 1873. We have a number of specimens resembling V. dominicense Gabb but with only three instead of four plications on the columella. Dr. Dall kindly examined one and notes that it is 2490 DOMINICAN FosstLs—MAuURY 85 not represented in the National Museum, but is like Gabb’s species except for the number of folds. Length of decollate shell 38, greatest width 24 mm. Locality.—Zone D, Rio Gurabo at Los Quemados. Genus MELONGENA Schumacher Melongena consors Sowerby Plate 14, Figure 5 Pyrula consors Sowerby, Quart. Jour. Geol. Soc., London, vol. 6, p. 49, 1849. Melongena melongena Gabb (in part,) Trans. Amer. Phil. Soc., vol. 15, p- 205, 1873. Not JZ. melongena Liuné, nor MW. patula Brod. and Sby. Pyrula melongena Guppy (in part) Geological Mag. London, p. 438, 1874. Pyrula melongena Guppy, Quart. Jour. Geol. Soc. London, vol. 32, Pp. 523, 1876. Melongena consors Dall, Trans. Wagner Inst. Sci., vol. 3, pt. 1, p. 121, 1890; pt. 6, p. 1584, 1903. This is the higher spired, ancestral form of 7. melongena which abounds on the Monte Cristi beach. The fossil shell is also abundant. Our largest specimen measures 12585 mm. It occurs also at Cumana, and Bowden. Locality. —(Exp’d’16) Bluff 3, Cercado de Mao; Zone I, Rio Cana at Caimito. Genus MetuLta H. and A. Adams Metula cancellata Gabb Plate 14, Figure 19 Metula cancellata Gabb, Trans. Amer. Phil. Soc., vol. 15, p. 205, 1873. Metula cancellata Dall, Trans. Wagner Inst., vol. 3, pt. 6, p. 1584, 1903. Closest akin to this shell is the Isthmian species 17. Gabdz Brown and Pilsbry from the Gatun beds (Proc. Acad. Nat, Sci. Phila) pe a5 re lea Sno An Oa TOT T.) Dr. Dall reports Wetula cancellata from the Bowden beds, Jamaica. Wocaliy | xpd ito) blithe, Cercado de Macon ai CA single specimen only of this exquisite shell.) 86 BULLETIN 29 250 Genus PHos Montfort Phos Gabbit Dall Plate 14, Figure 6 fhos Veraguensts Gabb (in part,) Trans, Amer. Phil. Soc., vol, 15, p- 212, 1873. Not FP. veraguensis Hinds. Phos Gabbii Dall, Proc. U. S. Nat. Museum, vol. 19, No. 1110, pp. 310, 311, pl. 20, fig. 4, 1896. Shell with twenty ribs on the ‘last whorl crossed by spiral bands. Length 22, width 11 mm. Dr. Dall has kindly compared our shells with his type which Bland collected at Potrero, Rio Amina. The shell also is found at Bowden. Localities. — (Exp’d ’16) Bluffs 2 and 3, Cercado de Mao. Phos Moorei Guppy Plate 14, Figures 7, 8 Phos Veraguensis Moore, Quart. Jour. Geol. Soc. London, vol. 6, p. 4oand 43, 1849. Phos Mooret Guppy, Quart. Jour. Geol. Soc. London, vol. 22, p. 290, pl. 16. fig. 11, 1866. Phos Veraguensis Gabb (in part) Trans. Amer. Phil. Soc., vol, 15, p. 212, 1873. Not P. veragwensis Hinds nor elegans Guppy. Phos erectus Guppy, Geol. Mag., vol. 11, p. 410, pl. 16 fig. 1, 1874. Phos Moorez Dall, Proc. U. S. Nat. Museum, vol. 19, No. IIIo, pp. 3210, 311, 1896. This species is closely related to the recent West coast Phos veraguensis as a comparison with specimens from Veragua proves. P. gatunensis Toula appears to be the Isthmian analogue. We are indebted to Dr. Dall for comparing our shells with Guppy’s Bowden type of P. Mooret. Localities. —(Exp’d ’16) Zones E and F, ( Conan Rio Gurabo at Los Quemados. A shell from Bluff 1, Cercado de Mao was identified by Dr. Dall as a mutation of this species. Phos elegans Guppy Plate 14, Figure Io Phos elegans Guppy, Quart. Jour. Geol. Soc. London, vol. 22, p. 290, pl. 16, fig. 13, 1866. Phos Veraguensis Gabb (in part) Trans. Amer. Phil. Soc., vol. 15, p’ 251 DOMINICAN FossILts—MauRy 87 212. Not P. veraguensis Hinds. Phos elegans Guppy, Quart. Jour. Geol. Soc. London, vol. 32. p. 524 1876. Exclude synonymy. Dr. Dall most kindly compared our Dominican shells with Guppy’s Bowden type, and pronounced them identical. Ours appear slightly more shouldered, with a less convex body whorl, and usually show a number of varix-like thickenings which Guppy does not mention in his description. The shell was also found by Guppy at Cumana. Localities. — (Exp’d ’16) Zones D and E, Rio Gurabo at Los Quemados (Common); Trail Hato Viejo to Potrero, Rio Amina. Phos Guppyi Gabb Plate 14, Figure 9 Phos Guppyi Gabb, Trans. Amer. Phil. Soc., vol. 15, p. 212, 1873. Phos Guppyi Guppy, Quart. Jour. Geol. Soc., London, vol. 32, p. 524, 1876. Strongylocera Guppyi Dall, Trans. Wagner Inst. Sci., vol. 3, pt. 6, p. 1584, 1903. This shell is particularly interesting because of the changes in sculpture it assumes at different stages of its early life. The recent P. Beauzi Fischer, from Guadaloupe has some resem- blance to our fossils, but the spiral sculpture is mtich weaker. P. Guppyt is also found at Bowden. Locality. — (Exp’d ’16) Zone D, Rio Gurabo at Los Quemados (Rare). Phos semtcostatus Gabb Plate 14, Figures 11, 12 Phos semicostatus Gabb, Trans. Amer. Phil. Soc., vol. 15, p. 212, 1873. P. semtcostatus has never heretofore been figured, but we have a number of metatypes sent by Gabb which he collected in Santo Domingo in the early Seventies. The Isthmian analogue is the much larger shell, P. swbsemz- costatus Brown and Pilsbry. 88 BULLETIN 29 252 Phos costatus Gabb. Plate 14, Figures 13, 14 Phos costatus Gabb, Trans. Amer. Phil. Soc., vol. 15, pp. 212, 213, 1873. We have a number of Gabb’s metatypes which have been very helpful for comparison in identifying this unfigured species. It belongs to the section Strongylocera Morch. Locality. — (Exp’d ’16) Bluff 3, Cercado de Mao. Phos fasciolatus Dall Plate 14, Figures 15, 16 Phos (Strongylocera) fasciolatus Dall, Proc. U. S. Nat. Museum, vol. NO}, INO) TI), JO, Aree, jolly iS}, rower, A, WeKaVy, This species is extremely close to Phos costatus. The latter is somewhat more robust; with fewer longitudinal ribs (9 against Ii—14); with the spirals tending to become obsolete in the interspaces; and with a smaller protoconch, the spirals not appearing until after the fourth riblet. The type of P. fasciolatus was collected by Bland at Potrero Rio Amina. Localities. — (Exp’d °16) Zones H. and I, Rio Cana at Caimito (Abundant); Bluff 3, Cercado de Mao. Phos metuloides Dall Plate 14, Figure 17 Phos metuloides Dall, Proc, U.S! Nat. Mus:,) vol. 19; No: Tino, p- 310; pl. 28, fig. 15, 1896. The type was collected by Bland at Ponton, Santo Domingo. The shell has also been found at Monkey Hill, Isthmus of Panama. Genus NASSARINA Dall Nassarina Olssoni, n. sp. Plate 21, Figure 2 Shell small, spindle-shaped, protoconch of only about one whorl, smooth; post-embryonic whorls five, channeled anter- iorly, the suture lying in the deep channel; sculpture of slightly oblique, strong, longitudinal ribs and fainter spirals; a faint spiral lies just anterior to the suture, then a band, and two 253 DoMINICAN Fossiis-—MAuRY 89 spirals follow on the whorls of the spire, but additional spirals appear on the last whorl making about twelve in all; the ribs extend from suture to suture but are deeply cut by the channel, they number about eleven on the last whorl; aperture rather narrow; outer lip somewhat thickened, with four internal denti- cles, the posterior being the strongest; inner lip with a callus and denticulate. Length 4.5, width 1.60 mm. This species has the form of the recent VV. e/ypia but differs strikingly in the deeply excavated suture, single embryonic volu- tion, and adult sculpture. Locality.—(Exp’d ’16) Bluff 3, Cercado de Mao. Genus METULELLA Gabb Metulella venusta Sowerby Plate 15, Figures 26, 27 Columbella venusta Sowerby, Quart. Jour. Geol. Soc. London, vol. 6, PP, 46, 47, pl. 9, fig. 6, 1849. Metulella venusta Gabb, Trans. Amer. Phil. Soc., vol. 15, p. 206, 1873. Columbella venusta Guppy, Quart. Jour. Geol. Soc. London, vol. 32, Pp. 526, 1876. We have a number of Gabb’s specimens to compare with ours. J. venusta has not been found outside of Santo Domingo. Localities.—(Exp’d ’16) Bluff 1, CEES de Mao; Zone G, Rio Gurabo at Los Quemados. Metulella fusiformis Gabb Plate 15, Figure 28 Metulella fusiformis Gabb, Proc. Acad. Nat. Sci. Phila., p. 270, pl. Il, fig. 3, 1872. Metulella fusiformis Gabb, Trans. Amer. Phil. Soc., vol. 15, p. 206, 1873. We have a metatype from Santo Domingo sent by Gabb of this rare shell. Itis the genotype of Metulella. Gabb thought the affinities of the genus were with the Fusinae, Fischer with Mangilia, and Dall with Nassarina. go BULLETIN 29 254 Metulella Williamgabbi, n. sp. Plate 15, Figure 29 Shell slenderly fusiform, whorls nine, the first two smooth, nuclear, subsequent volutions ornamented by uniform, narrow, longitudinal riblets of which there are twenty-five on the last whorl; spiral striae faint, obsolescent; whorls flattened on the sides; narrowly channelled above the suture; aperture elliptical; inner lip with a callus bearing six transverse denticles; outer lip with six distinct lirae and a seventh weaker one within the aperture. Length of shell 17, of aperture 7, of spire 10; greatest width 6 mm. This species is very closely related to 17. fustformis, but can be easily differentiated by its laterally flattened whorls, higher spire, and obsolescent spirals. The surface is not regularly can- cellate, nor are the whorls evenly and convexly rounded as in M. fusiformis. This interesting shell is named in honor of Professor Gabb by whom it was collected in Santo Domingo over forty years ago. It is the third species of his Dominican genus J/etulella. Genus ALECTRION Montfort Alectrion cercadensts, N. sp. Plate 15, Figures 19, 20 Shell small, acute, with two and a half nuclear, and four and a half post-nuclear whorls; longitudinal sculpture of small, rounded, oblique ribs, twelve on the last whorl; the ribs often become obsolete on the body whorl, spiral sculpture of raised threads, nodular on crossing the ribs, four to six on each volu- tion of the spire; on the body below the four spirals is an anter- ior set of ten finer spirals; where the ribs become fainter, equal- ling the spirals, a subcancellate ornamentation results, very char- acteristic of this species; anterior sulcus deep; beak sculptured by six spirals; outer lip with a stout external varix, denticulate within and with long lire. Length 7.5, greatest width 5.25 mm. A cancellate specimen with obsolete ribs on the last whorl meas- 255 DOMINICAN FOssILS—MAURY gI ures 7.5X5 mm. Gabb does not mention any Dominican Nassas. Guppy identified those in Heneken’s collection with the European JV. zncrassata, Locality. — (Exp’d ’16) Bluffs 2 and 3, Cercado de Mao. Alectrion gurabensts, n. sp. Plate 15, Figure 21 Nassa incrassaia Guppy, Quart. Jour. Geol. Soc. London, vol. 32, p. 524, 1876. Not NV. zucrassata Muller, Shell larger and stouter than the other two species, with three smooth nuclear and six sculptured post-nuclear whorls, convex, angulated and shouldered; suture wavy; longitudinal sculpture of narrow, rounded ribs, eleven on the body whorl, al- ternating with wider interspaces; spiral sculpture of three strong- er, more widely spaced threads revolving about the middle of each whorl of the spire with, on the penultimate volution, three additional weaker threads on either side; on the last whorl there are three or four threads posterior to the three primaries and twelve anterior; anterior sulcus well defined; beak with eight spirals; aperture round; outer lip with eight liree within; inner lip with a posterior denticle; collumella rugose. Length 11, 6 mm. This species resembles the recent A. zzcrassata Muller, rang- ing from Iceland to the Mediterranean, but that has convex, not angulated whorls, sixteen ribs, a larger callus, and thicker outer lip. Our fossil also recalls 4. consensa Ravenel and possibly is the same as the Bowden shell listed by Dall as Massa near CONSENS. Locality. — (Exp’d ’16) Zone D, Rio Gurabo at Los Que- mados. Alectrion losquemadica, n. sp. Plate 15, Figures 22, 23 Nassa ambigua Dall (in part), Trans. Wagner Inst. Sci., vol. 3, pt. 6, p- 1584, 1903. Not JV. ambigua Montagu. 92 BULLETIN 29 ; 256 Shell closely resembling the recent A. ambigua, which abounds on the beach at Monte Cristi; but differing in the fol- lowing respects: — (1) The perfect fossil shells have an elevated, conical protoconch of three to three and one-half smooth whorls, the apical very small, the others gradually increasing; while the recent shells all have a broad protoconch formed of one and one- half to two smooth, flattened, and noticeably swollen whorls; (2) the fossil shells have fourteen ribs on the last whorl, the recent only twelve; (3) the fossil shells are smaller, our largest recent shell measures 12 <7, but the largest fossil is only 8X5 mm. I would think the fossil shell a dwarfed form of the recent were it not for the striking difference in the protoconchs, sug- gesting that they were derived from diverse ancestral stocks. Dr. Dall listed 4. ambigua from Bowden, Jamaica, and from Santo Domingo. Probably the Dominican, and perhaps the Bowden forms are the same as ours. The Gatun species 4. przambigua Brown and Pilsbry differs from our shell widely in its spiral sculpture, the spirals being spaced instead of closely crowded as in the Dominican shell, which has twenty as against eight on the last whorl above the sulcus, and seven against three on the penultimate whorl. The Gatun species also has fewer nuclear volutions. Locality. — (Exp’d ’16) Zone D, Rio Gurabo at Los Quemados. Genus Trrt1A Risso Tritia golfoyaquensis, N. Sp. Plate 15, Figures 24, 25 Shell with an elevated acute spire, suture distinct; whorls seven, convex, surface ornamented with very regular, flat spiral ridges (eight on the penultimate whorl) sub-cancellated by much feebler longitudinal growth-lines; aperture wide, oval; anterior sinus deep; outer lip sharply striate internally; inner lip with a posterior callus; canal twisted. Length 17, width 9 mm. Locality. — (Exp’d ’16) Bluff 3, Cercado de Mao. 257 | DOMINICAN FossILs—MAuRY ” O% Genus ECTRACHELIzZA Gabb Ectracheliza truncata Gabb Plate 15, Figures 1, 2 Ectracheliza truncata Gabb, Proc. Acad. Nat. Sci. Phila., vol. 24, p. 271, pl. 9, fig. 2, 1872; Trans. Amer. Phil. Soc., vol. 15, p. 214, 1873. Clea truncata Guppy, Quart. Jour. Geol. Soc. Loc. London, vol. 32, p. 524, pl. 29, fig. 6, 1876. Lctracheliza trnncata Fischer, Man. de Conchyliologie, p. 637, 1887. We have several metatypes collected by Gabb in Santo Do- mingo. The apex is always eroded. Guppy erroneously referred this species to the fluviatile, Malayan genus Clea H. and A. Adams. J. truncata is the genotype and sole species of Gabb’s E:ctracheliza. Genus COLUMBELLA Lamarck Subgenus JZeta Reeve Meta islahispaniole, n. sp. Plate 15, Figure 3 Shell small, coniform, spire very acute, suture distinct, whorls eight, the first two smooth, nuclear, horn-colored or glassy; first three post-nuclear whorls ornamented with longitu- dinal riblets, eight or ten to each volution, giving them a coro- nate aspect; these riblets then entirely fade out, so that the last three whorls of the spire are smooth except for arcuate growth- lines, and are channeled; body-whorl with a shoulder carina and marked anteriorly by a varying number of incised lines, there being on one shell only six near the base, but on the other about twenty, extending almost to the center of the whorl; aper- ture very narrow; inner lip with a thickening at the center; outer lip thickened externally, the thickening slightly plicated at the base, margin of lip thin, bearing within about fifteen short liree; anterior sinus rounded, posterior U-shaped, situated above the shoulder carina. Length 11, width 6 mm. This rare shell appears to be referable to the genus Meza. 94 BULLETIN 29 258 - Locality. — (Exp’d ’16)—Bluffi 3, Cercado de Mao. Meta perplexabilis, n. sp. Plate 15, Figures 4, 5 Shell with a slight general resemblance to 17. ehamella Du- clos; entirely smooth except for faint growth striz and a vary- ing number of incised lines and corresponding ridges on the an- terior part of the body whorl; nuclear whorls two, swollen, glassy; post-nuclear whorls five, slightly truncated at their posterior margin, and so coiled as to project a trifle above the suture, rendering it sub-canaliculate; over the last half of the body whorl the suture droops then suddenly rises abruptly near the aperture; inner lip of adult shells with a thin callus through which the spiral threads of the body appear as rugosities; outer lip with a slight external thickening, a thin margin and with about sixteen liree within; but immature shells have a smooth outer lip. Length of shell 13, greatest width 6 mm. This perplexing shell seems nearest to the genus J/e/a. It resembles a young Stvombus in general form. Locality. — (Exp’d ’16)—Bluff 3, Cercado de Mao. Subgenus Stvombina Moerch Strombina hattensts Sowerby Plate 15, Figure 18 Columbella haitensis Sowerby, Quart. Jour. Geol. Soc. London, vol. 6, p- 46, 1849. Not Strombina Haitensis Gabb, Trans. Amer. Phil. Soc., vol. 15, p. 221, 1873. Columbella haitensis Guppy, Quart. Jour. Geol. Soc., vol. 32, p. 526, 1876. Anachts haitensis Dall, Trans. Wagner Inst. Sci., vol. 3, pt. 6, p. 1584, 1903. We are greatly indebted to Dr. R. Bullen Newton of the British Museum for his kindness in sending us photographs of this perplexing, unfigured species. Dr. Newton writes, ‘‘I have critically examined Sowerby’s Columbella haztensis consisting of 259 DOMINICAN Fossits—MaAurRy 95 6 specimens and they all appeal to me as representing the genus Strombina. To make this decision, however, more emphatic I have had the group of shells photographed both natural size and an enlargement of 4 diameters. * * *. These I think wili fully convince you that Gabb was correct in referring the species to Strombina.’’ But the Strombina referred by Gabb to haztenszs is ribbed only on the spire, zever on the body (except when young) and the shell is more ventricose and larger than the true haztensts. I have called it pseadohattensts. Our shell nearest hazfenszs is Strombina Bassi. This is of the same ribbed type, but very much larger, measuring 11.50 X 5, against 7X 3.50 mm. Anachis exilis Gabb, with which S. haztenszs has been con- fused, is a true Azachis and entirely distinct. Strombina pseudohattensts, n. sp. Plate 15, Figures 12, 13 Strombina Hatitensits Gabb, Trans. Amer. Phil. Soc., vol. 15, p 221, Not Columbella Haztensis Sowerby, 1849. Flanaxsts crasstlabrum Guppy, Geol. Mag. London, p. 411, pl. 18, fig. 13, 1874. (Young specimen). This differs from the true S. hazfenszs in the absence of rib- bing from the body whorl of adult shells. The ribs become ob- solete on the sixth or seventh and are never present on the eighth whorl. A large shell measures 9X5 mm. We have specimens from Gabb and many hundreds of our own of all ages. Localities.—(Exp’d ’16)—Bluffs 3, Cercado de Mao. (Ex- tremely abundant). Strombina pseudohaitensis variety gurabensts, n. var. Plate 15, Figure 14 Shell oblong-ovate, slender, high-spired, whorls eight, the first three smooth, nuclear; riblets on the fourth oblique, on the fifth vertical, on the sixth obsolete, the seventh and eighth are smooth except for spiral impressed lines at the anterior third of 96 BULLETIN 29 260 the eighth; outer lip internally notched, with a thickened ridge, but not yet denticulate. Length 8, width 4 mm. This shell differs in its slenderer form from S. pseudo- hattensts. Locality.—Zone G, Rio Gurabo at Los Quemados. (Rare). Strombina Basst, n. sp. Plate 15, Figure 17 Shell with eight whorls, the first two nuclear, smooth, sub- sequent whorls ornamented with close-set riblets, twenty-one on the penultimate whorl, but only ten on the last whorl, since they become obsolete on the latter half of that volution; spiral sculp- ture of impressed revolving lines on the anterior half of the last whorl; a stout varix lies just behind the outer lip and beside it are two longitudinal wrinkles representing the obsolete riblets; outer lip with a couple of denticles posterior to the notch and about nine anterior; inner lip encrusted with callus; columella rugose, with seven irregular, transverse plications; canal very short, reflexed. Length 9, width 5 mm. S. caribea has no riblets, S. pseudohattensis has riblets only on the spire, S. Basst has riblets continuing until the last half of the last whorl. This species is named in honor of Mr. Albert M. Bass, Con- suelo Estate, Macoris, Santo Domingo. Localities. —(Exp’d’16) Zones D and E, Rio Gurabo at Los Quemados. Strombina Nanniebelle, n. sp. Plate 15, Figures 15, 16 Shell ovate, spire acute, last volution inflated, suture dis- tinct, whorls nine, the first three smooth, nuclear, the fourth and fifth with fine, microscopic, close, longitudinal riblets, the sixth, seventh and eighth entirely smooth, the ninth has about a dozen spiral grooves anteriorly and one sub-sutural groove and corresponding ridge; outer lip with a varix-like thickening, en- DomINIcAN FossiILs-—MAURY 97 tirely smooth within; inner lip with a posterior dentate callosity, and a thin plate of callus on the columella through which the spiral striations are seen; aperture wide, elliptical. Length 13, width 7 mm. This species is named in honor of Miss Nannie Belle Maury of Washington, D. C. Localities.—(Exp’d ’16) Sandy clays, Zones H and I, Rio Cano at Caimito. (Abundant and characteristic.) Strvombina cyphonotus Pilsbry and Johnson Plate 15, Figures 7, 8 Strombina gradata Gabb (in part), Trans. Amer. Phil. Soc,. vol. 15, p. 221, 1873. Not Columbella gradata Guppy, Quart. Jour. Geol. Soc. London, vol 22, p. 288, pl. 16, fig. 10, 1866. Strombina Gabbiana Newcomb, Manuscript. Specimens Cornell Uni- versity Museum, No. 19750 Newcomb Collection. Strombina cyphonotus Pilsbry and Johnson, Proc. Acad. Nat. Sci. Phila, py 353 pl 25; tgs) 6,.7, 19LT- Nearly half a century ago Dr. Newcomb noted that this species was not identical with Guppy’s Jamaican S. gvadata, and gave the manuscript name S. Gabdiana (Newcomb Collec- tion No. 19750). In late years Johnson and Pilsbry named the Dominican shell S. cyphonotus. Strombina prisma Pilsbry and Johnson Plate 15, Figures 9, Io Strombina gradata Gabb (in part), Trans. Amer. Phil. Soc., vol. 15, p. 221, 1843. Not Columbella gradata Guppy, Quart. Jour. Geol. Soc. London, vol. 22, p. 288, pl. 16, fig. 10, 1866. Strombina prisma Pilsbry and Johnson. Proc. Acad. Nat. Sci. Phila., PP- 352, 353, pl. 15, figs. 9, Io, Tort. The closest allies of S. prisma are S. cyphonotus and the Gatun analogue, S. Lessepsiana Brown and Pilsbry. S. cancel- fata Sowerby, living at Panama, has the same triangular last whorl, and an extremely prominent dorsal hump, but the whorls are carinated and coronated. 98 BULLETIN 29 262 Strombina caribea Gabb Plate 15, Figure 6 Strombina carib@a Gabb, Trans. Amer. Phil. Soc. vol. 15, p. 221, 1873. Astyris cartb@a Dall, Trans. Wagner, Inst. Sci., vol. 3, pt. 6, p. 1584, 1903. We have a metatype of this unfigured, greatly thickened species, distinguished from the other Dominican Strombinas of similar size by the single hump, the Ranella—tlike flattening, and the entire absence of longitudinal ribs. The shell occurs also at Bowden. Strombina Neustrasenore, n. sp. Plate 15, Figure 11 Shell with seven whorls, the first two smooth, nuclear, the third with minute oblique riblets, the fourth and fifth with verti- cal riblets, sixth and seventh volutions smooth; on the last whorl behind the varix of the lip is an oblique hump and on the left side of the body, opposite to the outer lip, are two longitud- inal wrinkles; at the base of the shell are a number of impressed spiral lines; outer lip with a conspicuous, thickened margin as- cending to the suture, and with six internal denticles; inner lip encrusted with callus; collumella rugose with six short, trans- verse plications; canal short, sharply reflexed. Length 8, width 4.50 mm. This pretty species is characterized by its curious thickened, ascending outer lip. Locality—(Exp'’d ’16) Zone G, Rio Gurabo at Los Quema- dos. (Rare). Strombina divilitus Harris and Maury, n. sp. Plate 21, Figure 12 Strombina extlis Gabb, Jour. Acad. Nat. Sci. Phila., vol. 8, new ser. p. 356, pl. 46, fig. 41, 1874—1881. Not Strombina extl1s Gabb, Trans. Amer. Phil. Soc. vol. 15, p. 222, 1873. As noted under Anachis extlis Gabb, two very different shells were named by Gabb Strombina exilis. The Santo Do- mingo shell retains this name and the Pliocene species from Costa Rico we have renamed divzlztus. 263 DOMINICAN Fossi1s—MAuRY “99 Subgenus NITIDELLA Swainson Nitidella cibaotca, n. sp. Plate 21, Figures 3, 4 Shell polished and shining, somewhat Strombiform, smooth except for growth lines and for faint, obsolete longitudinal rib- lets on the first two post-nuclear whorls; spire elevated, acute, suture distinct, linear; nuclear whorls two, post nuclear six, gently convex; apeture acute posteriorly, widening and truncate anteriorly; inner lip with two small plications; outer lip much -.thickened, its margin slightly inflected, bearing within about ten denticles. Length 15, width 8 mm. This apecies appears somewhat intermediate between JV. nitida Lamarck and WV. laevigata Linné, both now living in the West Indies. Apparently this is the first \Vztzdella to be found inthe blue clays of Santo Domingo. : Localities —(Exp’d ’16) Sandy clays of Rio Cana at Cai- mito; Zone D, Rio Gurabo at Los Quemados. Subgenus ANacuis H. and A. Adams Anachis extlis Gabb Plate 21, Figure 5 Strombina extilis Gabb, Trans. Amer. Phil. Soc., vol. 15. p. 222, 1873. Not Strombina exilis Gabb. Jour. Acad. Nat. Sci. Phila., New Ser., vol. 8, p. 356, pl. 46, fig. 41, 1874—1881. — (.S. dztvilitus Harris and Maury.) Columbella exilis Guppy, Quart. Jour. Geol. Soc. London, vol. 32, p. 526, 1876. : Anachis exilis Dall, Trans. Wagner Inst. Sci., vol. 3, pt. I, p. 135, 1890. Anachts hattensis Dall, /d, pt. 6, p. 1584, 1903. Not haitensis Sow- erby. We have metatypes from Gabb and at least a thousand spec- mens of our own of this pretty shell. It has been confused with Strombina hattensis, but is perfectly valid and distinct. It TOO BULLETIN 29 264 does not attain a length exceeding 5 mm. This Anachis also occurs at Bowden. Locality.—(Exp’d ’16).—Bluff 3, Cercado de Mao. (Ex- tremely abundant.) Subgenus Astyris H. and A. Adams Astyris Debooyi, n. sp. Plate 21, Figure 6 Shell with six whorls, the first two glassy, nuclear; the four following porcellanous, entirely smooth except for six revolving, impressed lines at the anterior part of the last whorl; collumella with a thin callus through which the six striz encifcling the base of the shell are visible; outer lip with six minute, micro- scopic denticles, of which the two posterior are much the stronger. Lengthof shell 5, of aperture 2, greatest width 2 mm. This species has an extra whorl and slenderer form than Say’s A. lunata. It is very close to acanthodes Dall, from the Tampa silex beds, Florida. This is the first true Astyris reported from the Santo Do- mingo Tertiaries. It is dedicated to Mr. Theodoor de Booy, of New York City, who is carrying on extensive researches in the archeology of Santo Domingo. Locality.—(Exp’d ’16)—Bluff 3, Cercado de Mao. (Rather rare. ) Genus StroMBINELLA Dall Strombinella acuformis Dall Plate 21, Figure 7 Strombinella acuformts Dall, Proc. U. S. National Museum, vol. Io, no. IIIO, p. 312, pl. 29, fig. 6, 1896. There are but three specimens known of this rare and grace- ful shell. We possess one that Gabb collected, and the other two are in the National Museum. The type locality is Potrero, Rio Amina. Genus Typuis Montfort Typhis alatus Sowerby Typhis alatus Sowerby, Quart . Jour. Geol. Soc. London, vol. 6, p. 48, 265 DOMINICAN Fossiis—MAuRY IOI pl. to, fig. 4, 1849. Typhis alatus Gabb, Trans. Amer. Phil. Soc., vol. 15, p. 203, 1873. Typhis alatus Guppy, dem, vol. 32, p. 522, 1876. This rare shell is characterized by the very thin, greatly ex- panded, wing-like varix. The type was collected by Heneken in Santo Domingo and Guppy identified the shell from Bowden. Typhis cercadicus, n. sp. Plate 16, Figure 12 Shell small, each whorl with four varices and four tubes, the tubes arising slightly behind the varices; on the last whorl are faint indications of about six raised spiral lines; the whorls are shouldered and the varices end at the shoulder; canal wide, cov- ered, former position of canal indicated by a tubular process be- side the canal. Length of shell 7, width 4.25 mm. Locality.—Bluff 1, Cercado de Mao. (Very rare) Genus Murex Linné Murex messorius Sowerby Plate 16, Figures 1, 2 M. messorius Sowerby, P. Z.S., p. 137, 1840. MM. messorius Reeve, Conch, Icon. Murex fig. 90, 1845. MM. recurvtrostris Gabb, Trans. Amer. Phil. Soc., vol. 15, p. 201, 1873. Not W. recurvirostris Broderip. M. messorius Dall. Trans. Wagner, Inst. Sci., vol. 3, pt. 1, p. 139, 1890. WM. messorius, Dalland Simpson, U. S. Fish Comm. Bull. for 1goo, vol. I, p. 407, I9ol. M. messorius Brown and Pilsbry, Proc. Acad. Nat. Sci. Phila., p.353, IQIT. This ancient static species is still living on the Monte Cristi beach and has undergone no change since the deposition of the blue clays. It is also found at Gatun. Localities.— (Exp’d ’16) — Bluff 3, Cercado de Mao (very abundant); Zone D, Rio Gurabo at Los Quemados. Murex domingensis Sowerby Plate 16, Figures 3, 4, 5, 6 Murex Domingensis Sowerby, Quart. Jour. Geol. Soc., vol. 6, p. 49, TO) BULLETIN 29 266 pl. 10, fig. 5, 1849. M. Domingensis Guppy, Quart. Jour., vol. 22, p. 288, 1866. MM. Domingensits Gabb. Trans. Amer. Phil. Soc., vol. 15, p. 201, 1873. iM. domingensis Dall, Trans. Wagner Inst. Sci., vol. 3, pt. 6, p. 1584, 1903. M. vecurvirostris domingensis Brown and Pilsbry, Proc. Acad. Nat. Sci. Phila., pp. 353—354, IQII. Closely allied to this species is J7. yaguensis (antillarum Gabb, name preoccupied). That typically is high spired, slender, fusiform, while 47. domingensis has a broad ovate form, a low spire, and three, instead of four or five intervarical ribs. But-we have specimens of domingensts with the ribbing of yaguenszs. M. domingensis is apparently the ancestor of the recent JZ. antillarum Hinds (nodatus Reeve) which Tryon, I think erron- eously, united with 7. recurivostris Broderip. M. anidllarum Hinds is living on the beach at Monte Cristi. It has the form of M. domingensis but the canal is longer and the spines much more developed. M. domingensis has been found at Bowden, Cumana, and the Caroni Series of Trinidad (Guppy). Localities—(Exp’d ’16) Large, typical shells with three in- tervarical ribs, on the Guayabin to Mao road, Rio Cana; the mu- tation, with four or five intervarical ribs, approaching 17. yaquen- sts, Bluff 1, Cercado de Mao, and Zone F, Rio Gurabo. An ex- traordinarily large specimen (Fig. 6), 74X42 mm, apparently referable to 17. domingenis, Bluff 1, Cercado de Mao. Murex yaquensis, n. sp. Plate 16, Figure 7 M. antillarum Gabb, Trans. Amer. Phil. Soc.,vol. 15, p. 202, 1873. Not WW. antillarum Winds, Proc. Zool. Soc. p. 126, 1843. M. antillarum Guppy, Quart. Jour. Geol. Soc. London, vol. 32, p. FD TOT se : As Gabb’s name is preoccupied by Hinds, the fossil requires a new name and yaguensis seems appropriate. This species intergrades with 17. domingensits. I have spec- imens with the form of the latter and the ribbing of the former species. Our typical shell is a metatype of Gabb’s antillarum. - ee 267 DoMINICAN FossiIts—MaAuRy 103 Murex compactus Gabb Plate 16, Figure 8 Murex ( Pteronotus) compactus Gabb, Trans. Amer. Phil. Soc., vol. 15, p. 202, 1873. MM. compactus Dall, Trans. Wagner, Inst., vol. 3, pt. 1. p.142. Not textilis Gabb. M. compactus has much the general aspect of M/. znucisus Broderip living on the west coast, but the varices of the fossil species are moreornate. Our shellis a metatype sent by Profes- sor Gabb from Santo Domingo. Murex (Phyllonotus) cornurectus Guppy Plate 16, Figures 9, Io MM. (Chicoreus) megacerus Gabb, Trans. Amer. Phil. Soc., vol, I5, p. 202, 1873. Not W7. megacerus Sowerby. IM. cornurectus Guppy, Quart. Jour. Geol. Soc. London, vol. 32, p. 521, pl. 28, fig. 4, 1876. Our fossils fall into two groups:—(1) larger shells, identical with those sent by Gabb as 17. megacerus, and exactly like speci- mens from the Monte Cristi beach; (2) smaller shells identical with Guppy’s 7. cornurectus, but also apparently the same as the larger shells. Dr. Dall on being asked whether both should be re- ferred to brevifrons, replied that it wouid be better to call them cornurectus since, ‘‘the question of what brevifrons really is, needs study. I feel there may be more than one species In the series called brevifrons.’’ Localities. — (Exp’d ’16) Bluffs 1, 2, 3, Cercado de Mao (abundant in 3); Zones D and F, Rio Gurabo at Los Quemados; Zones H and I, Rio Cana at Caimito; Cerro Gordo to Mao road, and Guayubin to Mao road. Murex (Phyllonotus) prepauxillus, n. sp. Plate 16, Figure 11 Shell with seven whorls, the first two smooth, nuclear, later whorls with low crenate varices, six to a whorl, and three main, crenate ridges revolving around the periphery. The uppermost spiral of each trio carinates the whorl, and on crossing the vari- ces forms short, hollow spines; aperture narrowly elliptical; canal (ora) Co 104 BULLETIN 29 2 open, somewhat reflexed; outer lip edged by the final fimbriated varix and bearing within five well-marked denticles. Length 16, width 7 mm. This species is named fromits resemblance to 7. pauxillus A. Adams, living on the northwest coast of Mexico at Mazatlan. The fossil appears to be the ancestor of this shell. Locality.— (Exp’d’16.) Zone D, Rio Gurabo at Los Que- mados. Genus AsPELLA Moerch _ Aspella scalariotdes Blainville Plate 17, Figure 11 Murex scalarioides Blainville, Faune Frangaise, p. 131, pl. 5, figs.5,6, 1826. Aspella ? scalarioides Dall, Bull. Mus. Comp. Zool. Harv. Coll., vol. 18, p. 208, 1889. Aspella scalarioides Dall and Simpson, Bull. U.S. Fish Comm., vol- 20, pt. I, p. 410. I1g00. Dr. Dall very kindly examined our specimen and decided it was identical with the recent species living in the Antilles and the Mediterranean. Locality,—(Exp’d ’16) Zone D, Gurabo at Los Quemados. Genus CymiAa Moerch Cymia Flenekent, n. sp. Plate 17, Figure I Cuma tectum Gabb, Trans. Amer. Phil. Soc., vol. 15, p. 214, 1873. Not of Kiener, Chemnitz, or Reeve. Cuma tectum Guppy, Quart. Jour. Geol. Soc. London, vol. 32, p. 524, 1876. Cymia Woodi Dall (in part) Trans. Wagner Inst. Sci., vol. 3, pt, 1, Pp. 155, 1890. Purpura (Cuma) Woodit Guppy, Trans, Canadian Inst., p. 390, 1909: Cymia Woodit Maury, Jour. Acad. Nat. Sci. Phila., 2d ser., vol. 15, p. 82, pl. 11, figs. 9, Io, 1912. We have a number of specimens from Santo Domingo sent by Professor Gabb as Cuma tectum. A comparison of these with shells of the recent C. zectum collected by Dr. Newcomb on the coast of Ecuador, leads one to the conclusion that the fossil and recent shells are not identical. The fossils resemble those we co 289 DoMINICAN FossILs--MAURY 105 obtained some years ago ina deposit of asphaltum in Trinidad. At that time I followed Dr. Dall in identifying them with Gabb’s C. Wood from the Shiloh marls, New Jersey. But the typical shells are very different and it seems best to designate the Do- minican and Trinidadian form by a distinctive name. For this flenekent would seem appropriate, since Colonel Heneken first collected fossil shells in Santo Domingo. Genus CORALLIOPHILA Adams Coralliophila mtocenica Guppy Plate 18, Figure 6 Purpura miocenica Guppy, Geol. Mag. London, p. 4Io, pl. 16, fig. 9, 1874. Coralliophila miocenica Dall, Trans. Wagner, Inst., vol. 3, pt. 6, p. 1584, 1903. Cael e es tocenica has not been reported before outside of Jamaica. Our Dominican shells resemble Guppy’s figure, but the canalis somewhat shorter. Possibly they represent a variety of the Jamaican species. Localities. — (Exp’d ’16) Zone D, Rio Gurabo at Los Quemados. GUS OPER AMIE Vi wii NTOGLOS SA Genus StmpuLum Klein Simpulum pileare Lamarck Triton pileare Lamarck, An, sans Vert., 7, p. 82, 1822. Triton pileare Kiener, Icon. Coq., Viv. p. 15,pl. 7, fig. I. Tritonium lineatum Gabb, Trans. Amer. Phil. Soc., vol. 15, p. 211, 1873. Pinion pileare Dall, Trans. Wagner Inst., vol. 3, pt. I, page 161, 1890. ee pilearis Dall and Simpson, Bull. U. S. Fish Comm., vol. 20, pt. I, p. 417, for 1900 (1902). A fragment fromthe Rio Gurabo bluffs agrees in form and sculpture with shells of S. pz/eave from the Monte Cristi beach, but the fossil has dorsal humps recalling those of S. chlorostomum. In the Newcomb collection, however, there are specimens of pileare from the Philippines with similar humps. Gabb referred his specimen to the related, perhaps identical shell, S. Aineatum 106 BULLETIN 29 270 from the Gallopagos Islands. . Locality,— (Exp’d’16) Zone B, Rio Gurabo at Los Que- mados. Simpulum antillarum variety cercadicum, n. var. Plate 17, Figure 2 Cf. Triton antillarum d’Orbigny, De la Sagra, Hist. Pol. y Nat. Isla de Cuba, vol. 5, p. 248, 1845; Atlas pl. 23, fig. 20, 1855. _ Shell intermediate between d’Orbigny’s two recent species, S. antillarum and S. americanum, resembling the first in form and the second in the callus and wrinkles of the inner lip. Length 45, width 24mm. Tryon places axztllarum in the syn- onymy of tuberosum Lamarck, of which we have specimens from the Monte Cristi beach. It is quite a different shell with the por- cellanous callus of a true Gutturnium, while our fossil shells are referable to Szmpulum. Locality.— (Exp’d’16) Bluff 3, Cercado de Mao. Genus Lotorium Montfort Lotorium praefemorale, n. sp. Plate 17, Figure 3 Tritonium (Cymatium) femorale Gabb, Trans. Amer. Phil. Soc., vol. 15, p. 211, 1873. Not Zriton .femoralts Linné. . Triton femoralis Guppy, Geol. Mag. London, p. 438, 1874. Not of Linné. Triton femoralis Guppy, Quart. Jour. Geol. Soc. London, vol. 32, p. 522, 1866. Not of Linné. Shell resembling the recent Z. femorate Linné, but differing in the following respects:—(1) the spire is fusiform in the early stages, the whorls not carinate, nor coronate. In femorale the spire is fulguriform, coronated by a single row of tubercles; (2)the ape- ture is ovate in the fossil, biangulate in the recent. Our party collected the recent shell on the beach at Monte Cristi. It is the descendant of the ancestral species fossilized in the river bluffs. Locality.—(Exp’d ’16) Zone F, Rio Gurabo at Los Quem- ados. — 27% DOMINICAN FossILsS—MAURY 107 Genus GuTtuRNIUM Adams Gutturnium gracile variety gurabonicum, n. var. Plate 17, Figure 10 Cf. Triton gracilis Reeve, Conch. Icon., fig. 58 a, b. Shell resembling specimens of G. gracilis Reeve, living in the Antilles, but with more prominent dorsal humps, shorter canal, and surface much more finely reticulated. Length of de- collate shell 23, width 12 mm. This shell has some resemblance to Gabb’s Triton domin- gensis (See Guppy’s figure, Quart. Jour. Geol. Soc., vol. 32, pl. 209, fig. 2) but that species has an elongate aperture and nearly straight canal while ours has a round aperture and sharply twis- ted canal. Locality —(Exp’d’16) Zone D, Rio Gurabo at Los Quema- dos. Genus DistorTRIX Link Distortrix simillima Sowerby. Plate 17, Figures 4, 5 Triton simillimus Sowerby, Quart. Jour. Geol. Soc. London, vol. 6, p- 48, 1849. Persona simillima Guppy, Quart. Jour. Geol. Soc. vol. 22, p. 288, pl. 0G), 10K) TAI. 1Ws\ole) Distortia simillimus Gabb, Trans. Amer. Phil. Soc., vol. 15, p. 212, 1873. Persona simillima Guppy, Geol. Mag. London, p. 439, 1874: Quart. Jour. Geol. Soc., vol. 32, p. 522, 1876. Distortrix simillima Dall, Trans. Wagner Inst. Sci., vol. 3, pt. 6, p. 1584, 1903. Distorsio (Distortrix, Persona) gatunensis Toula, Jahrb. der K.—K. Geol. Reichsanstalt Wien, vol. 58, p. 700, pl. 25, fig. 10, 1908. Distorsio ga‘unensts Brown and Pilsbry, Proc. Acad. Nat. Sci. Phila., Pp. 356, pl. 26, fig. 8, r9r1. Toula’s type of D. gatunensis was an immature shell. Brown and Pilsbry have figured a larger specimen which is so like some of our Dominican shells that they seem entirely identical. The more so, since a very fine shell we collected has the embryonic 108 BULLETIN 29 272 whorls perfectly preserved and they correspond to Brown’s and Pilbry’s description of the protoconch of D. gatunensis. Gabb notes the resemblance of the Dominican fossil Dzstor- trix to the West Coast 2. constricta; but it is much more like specimens from St. Thomas, W. I., labelled by Dr. Newcomb videns Reeve. Localities — (Exp’d ’16) Zones A, B, D, E, Rio Gurabo at Los Quemados; Bluff 1, Cercado de Mao. (Very large and abun- dant). Genus Bursa Bolten Bursa crassa Dillwyn Plate 17, Figure 6, 7 Ranella crassa Dillwyn, Reeve, Icon., fig. 18, b. Ranella crassa Guppy, Quart. Jour. Geol. Soc., London, vol. 22, p. 288, pl. 18, fig. 9, 1866. Bursa crassa Gabb, Trans. Amer. Phil. Soc., vol. 15, p. 212, 1873. Ranella crassa Guppy, Geol. Mag. London, p. 438, 1874; Quart. Jour. Geol. Soc., vol. 32, p. 522, 1876. Gyrineum crassum Dall, Trans. Wagner Inst. Sci., vol. 3, pt. 6, p. 1584, 1903. This species is still living on unchanged in the Antilles. It occurs as a fossil at Bowden and in Santo Domingo. Localities—(Exp’d ’16) Rio Cana, Guayubin to Mao road, and Cerro Gordo to Mao road. Bursa bufoniopsis, n. sp. Plate 17, Figure 8 Shell somewhat flattened dorso-ventrally, whorls seven, the first two nuclear, subsequent volutions with two lateral varices each; varices rounded, their sculpture corresponding to the spiral ornamentation of the shell but rather more pronounced; intervari- cal tubercles three, often with a fourth, weaker tubercle on the dorsal side of the last two whorls; body whorl on the dorsal sur- face showing about nine spirals of which the uppermost is nodu- lar, the second, third, fifth, seventh and ninth are single, beaded, the fourth, sixth and eighth are paired, beaded. Aperture oval, outer lip slightly reflexed, fluted, bearing nine interrupted denti- 273 DoMINICAN FossILsS—MAuRY 109 cles on its margin and far within, beyond the groove correspond- ing to the varix, another row of seven smaller denticles. Inner lip strongly and closely wrinkled its entire length, upper (poster- ior) canal produced into a spout-like gutter, those of the last three whorls persisting on opposite sides of the varices; lower canal short, reflexed. Length 37, width 24 mm. This shell resembles the recent, larger Oriental B. bujfonza Lamarck in the characters of the aperture; abrupt reflexion of the anterior canal and spout-like extension of the posterior canal. The latter feature separates it from 2. 7home d’Orbigny. Locality.— (Exp’d ’16) Zones B and D, Rio Gurabo at Los Quemados. Bursa Amphitrites, n. sp, Plate 17, Figure 9 Shell with two varices to each whorl, the varices markedly discontinuous, 77zton-like, resembling those of B. scrobiculator, rounded, their sculpture conforming to the spiral structure of the whorls; intervarical tubercles seven to nine, small, rounded; whorls seven and a half convex, not flattened dorso - ventrally as in B. bufontopsis, the first two and a half volutions are smooth, nuclear, the third is decorated with two rows of minute tubercles after which the beaded spiral threads appear. The spiral sculp- ture of the last whorl consists of a row of bead-like nodules be- neath the suture followed by a very fine beaded spiral thread, a row of smaller nodules, a fine beaded thread, a row of nine rather small, rounded, intervarical tubercles, followed by five nodular spirals each alternating with a fine beaded thread. Aperture oval; outer lip fluted, reflexed anteriorly, bearing within about ten strong lirze some of which are double; inner lip extremely ru- gose, wrinkled its entire length; upper (posterior) canal U-shaped, apparently not much produced; anterior canal slightly reflexed. Length 46, greatest width 27 mm. This handsome species resembles the recent B. affinzs Brod- erip, but-differsin the discontinuous varices; the nearly straight columella; and more numerous intervarical tubercles. IIO BULLETIN 29 274 Localities.—(Exp’d’16) Rio Amina, between Hato Viejo and Potrero; Bluff 3, Cercado de Mao. Genus Cassis Lamarck Cassis sulcifera Sowerby Plate 18, Figures I, 2, 3 Cassis sulcifera Sowerby, Quart. Jour. Geol. Soc. London, vol. 6, p. 47, pl. 10, fig. 1, 1849. Cassis sulcifera Guppy, Quart. Jour., Geol. Soc., vol. 22, p. 286, 1866. Cassis sulcifera Gabb, Trans. Amer. Phil. Soc., vol. 15, p. 222, 1873. Cassis sulcifera Guppy, Geol. Mag. London, p. 439, 1874; Quart. Jour. Geol. Soc. London, vol. 32, p. 525, 1876. Cassis sulcifera Dall, Trans. Wagner Inst. Sci., vol. 3, pt. 6, p. 1584, 1903; Proc. U.S. Nat. Mus., vol. 51, No. 21€2, p. 508, pl. 86, fig. 4, 1916. This fine shell exhibitssuch diverse aspects in youth and in old age as to appear, without a connecting series, two different species. The descendant is C. fudbevosa Linné which we col- lected on the Monte Cristi beach. C. sulcifera has been found at Bowden and in the Flint River Oligocene, Georgia. It is abundant in Santo Domingo. Localities.— (Exp’d’16) Bluffs 1, 2, 3, Cercado de Mao; Zones C, B, E, D, F, Rio Gurabo, at Los Quemados; Zones H and I, Rio Cana at Caimito. Subgenus PHALIUM Link Phalium moniliferum Guppy Plate 18, Figures 4, 5; Plate 19, Figure 1 Cassis montilifera Guppy, Quart. Jour. Geol. Soc. London, vol. 22, p. 287, pl. 17, fig. 8, 1866. Cassidea granulosa Gabb, Trans. Amer. Phil. Soc., vol. 15. p. 222, 1873. Not C. granulosa Bruguiére. Exclude synonymy. Cassis reclusa Guppy, Geol. Mag. London, pp. 434, 439, 1874; Quart. Jour. Geol. Soc., London, vol. 32, p. 525, 1876. Cassis monilifera Guppy, Quart. Jour. Geol. Soc., vol. 32, p. 525, 1876. Cassis veclusa Dall, Trans. Wagner, Inst. Sci., vol. 3, pt. 6. p. 1584, 1903. There is no constant point of difference between C. monzli- fera and C. reclusa and intermediate forms connect the two, but 275 DOMINICAN Foss11sS—MAURY mon the extremes are unlike in aspect. I have designated our shells which resemble the latteras P. monzliferum reclusum Guppy. B oth forms occur at Bowden. Localities —(Exp’d ’16) P. moniliferum, Zones H and I, Rio Cana at Caimito; Zone G, Rio Gurabo at Los Quemados; Bluff 3, Cerado de Mao; P. moniliferum reclusum, Bluff 3, Cer- cado de Mao. Subgenus Cypraicassis Stutchbury Cyprecassis testiculus Linné Cyprecassts testiculus Linné fide Gabb, Trans. Amer. Phil. Soe., vol. i Dy AA e/a ‘We have a specimen from Gabb of this shell. The recent range is from the Antilles to Hatteras. Genus SconsiIa Gray Sconsia levigata Sowerby Plate 19, Figure 2 Cassidaria levigata Sowerby, Quart. Jour. Geol. Soc. London, vol. 6, P, 47; pl. 10, fig. 2, 1849. Cassidaria sublevigaia Guppy, /dem, vol. 22, p. 287, pl, 27, fig. 9, 1866. Cassidaria levigata Guppy, Geol. Mag. London, p. 439, 1874; Quart. Jour. Geol. Soc., London, vol. 32, p. 525, 1876. Sconsia levigata Brown and Pilsbry, Proc. Acad. Nat. Sci. Phila., p. 356, I9QII. We have alarge series of all ages and sizes of this fine species, exhibiting all gradations from smooth to striate. Among them are specimens exactly like Sowerby’s /evigata and Guppy’s Jamaican sublevigata. Ihave vainly attempted to satisfactorily separate out the latter as a variety. Only three living species are known. Of these, S. barbu- densis Higgins and Maratt, dredged off Barbuda, seems the near- est to the fossil, and its possible descendant. S. levigata occurs also at Gatun. Localities. — (Exp’d ’16) Zones A, B,D, E, F, Rio Gura- bo at Los Quemados; Bluff 1, Cercado de Mao. (Abundant.) I12 BULLETIN 29 276 Genus Morum Bolten Morum domingense Sowerby Plate 18, Figures 7, 8 Oniscia Domingensis Sowerby, Quart. Jour. Geol. Soc. London, vol. 6, p. 47, pl. 10, fig. 3, 1849. Cf, Ontscia harpula Conrad, Proc. Acad. Nat, Sci. Phila., p. 288, 1847, Jour eps LION plsore thio nos Morum Domingense Gabb, Trans. Amer. Phil. Soc., vol. 15,p. 223, 1873. Oniscia domingensis Guppy, Quart. Jour. Geol. Soc. London, vol. 32, Pp. 525, 1876. Lambidium domingense Dall, Trans. Wagner Inst., vol. 3, pt. 6, p. 1567, 1903. Mortum domingense Dall, Bull. 90, U. S. Nat. Museum, p. 85, pl. 12. fig. 28, 1915. Conrad considered this species identical with his Ovzscza harpula from the Vicksburg Oligocene; but.Gabb pronounced the Santo Domingo species ‘‘very different.’’ We have no specimen of the Vicksburg shell, but the description and figure are remark- ably like the Dominician shells. The fossil seriesis 17. harpula, chipolanum and domingense. The living representative is JZ. Dennisoni Reeve, of the Lesser Antilles. AZ. domingenseis one of the few species common to the Tampa silex beds and the Santo Domingo blue clays. Localities.—(Exp’d ’16)Bluff 1, Cercado de Mao; Zones D, E, F, Rio Gurabo at Los Quemados. Genus Dotium Lamarck Subgenus MALEA Valenciennes Malea camura Guppy Plate 19, Figure 3 Malea camura Guppy, Quart. Jour. Geol. Soc. London, vol. 22, p. 287, pl. 17, fig. 9, 1866. Malea ringens Gabb, (in part) Trans. Amer. Phil. Soc., vol. 15, P1223, 91873: Maleacamura Guppy, Quart. Jour. Geol. Soc., vol. 32, p. 525, 1876. Malea camura Dall, Trans. Wagner Inst. Sci., vol. 3, pt. 6, p. 1584, 1903. 277 DoMINICAN Fossiis-—MAuRY 113 Malea camura Brown and Pilsbry. Proc. Acad. Nat. Sci. Phila., p. 356, IQII. We have a large series, some of the younger shells being very like Guppy’s immature, Jamaican type. The nearest living ally and descendant is the West Coast M7. ringens Swainson. Some of our shells with fewer spiral bands look like 7. promum, but the characters of the aperture are more those of vimgens. A mutation from Zone F, Rio Gurabo has closer ribs, about 20. M. camura occurs at Bowden and is doubtfully reported from Gatun. Localities.—Zones F,G, Rio Gurabo at Los Quemados; Bluffs 2 and 3 (Very abundant, all sizes), Cercado de Mao. Malea, species indet. A very large species, 110 mm. in diameter, nearly twice as large as 17. camura, was found in Zone I, Rio Cana at Cai- mito, but is too imperfect to describe. Genus Pyruta Lamarck Pyrula Pilsbryt Smith Pyrula pilsbryt Smith, Proc. Acad. Nat. Sci. Phila., p. 213, fig., I 1907. In this species the surface between the primary spirals is flat, not concave asin P. carbasea Guppy from the Caroni Series, Trinidad. The type locality of P. Pilsbryz is Bowden. Locality.—(Exp’d ’16). Zone I, Rio Cana at Caimito. Genus OvuLA Bruguiére Ovula (Neostmnia) Wise-Woode, n. sp. Plate 22, Figure 17 Shell resembling O. sfelta in outline, smooth except for fine, wavy spirals near the extremities and delicate longitudinal growth-lines; outer lip markedly arcuate, bordered by a callus band; dorsal surface convex, with a slight but obvious hump most apparent on the latter half of the body whorl; columella with one very strong posterior plication; posterior canal sharply TOA Ke! BULLETIN 29 278 reflexed. Length 14, width 6 mm. This is the first Ovz/a ever found in the Dominican blue clays. Guppy’s Bowden O. zmmunitais slenderer and longer, the lip rectilinear and no hump is mentioned. The recent O. wnzplr- cata ismuch more delicate and slender but of the same group. This rare and pretty shell is named in honor of Mrs. Henry A. Wise-Wood of New York City. Locality —(Exp’d ’16) Bluff 3, Cercado de Mao. (A single shell). Genus CyprR#A Linné Cyprea FHenekent Sowerby Plate 19, Figure 4 Cyprea Henikeri Sowerby, Quart. Jour. Geol. Soc. London, vol. 6, p. 45, pl. 9, fig. 3, 1849. Cyprea Henekent Gabb, Trans. Amer. Phil. Soc., vol. 15, p. 235, 1873. Cyprea Henekenit Guppy, Geol. Mag. London, p. 440, 1874; Quart. Jour. Geol. Soc., vol. 32, p. 528, 1876. Cyprea Henekeni Dall, Trans. Wagner Inst. Sci., vol. 3, pt. 1, p. 165, 1890. Cyprea Henekeni Brown and Pilsbry, Proc. Acad. Nat. Sci., Phila., p. 356, IQII. C. Hfenekeni appears to be the forerunner of C. mus now living in the Atlantic Ocean and Mediterranien Sea. Typical specimens are especially like the variety bzcornzs Sowerby in form. The color marking of Henekenz, however, is different. Itcon- sists of large light spots in a dark network, forming an open ret- iculated design. A variety of C. Henekenz occurs at Gatun. Localities.—(Exp’ ’16) Bluff 1, Cercado de Mao; Zones E, G, Rio Gurabo at Los Quemados; Zones H and I, Rio Cana at Caimito. Cyprea Nouelt, n. sp. Plate 19, Figure 5 Shell large, exceedingly globose, showing the apex of the spire, aperture somewhat curved; inner lip with about sixteen 279 DOMINICAN FossILs—MAURY II5 rather weak teeth, the strongest anterior; outer lip with about twenty teeth, also strongest anteriorly and fading out posterior- ly; upper margin of outer lip projecting; surface of shell entirely smooth, with traces on the back of a color pattern of white spots of varying size on a dark ground. Length of shell 60, width 44, thickness 39 mm. This splendid cowry is about the size of C. Henekenz, but more globose and with no traces of dorsal tubercles, nor lateral corrugations, with a different color pattern, and with the apex of the spire visible. I take the liberty of naming this species in honor of Arch- bishop Nouel of Santo Domingo, whom I had the honor of meeting in his beautiful and historic Cathedral. Locality.— (Exp’d’16) Bluff 1, Cercado de Mao. Cyprea spurca Linné Plate 19, Figure 6 Cyprea spurca Linné, Syst. Nat., ed. 10, page 724, 1758. Cyprea spurca Reeve, Conch. Icon., 3, pl. 14, fig. 68, 1845. Cyprea spurca Gabb, Trans. Amer. Phil. Soc., vol. 15, p. 235, 1873. Cyprea spurca Dall and Simpson, Bull. U. S. Fish Comm., vol. 20, pt. I, page 420, 1900. I can find no points of difference between the fossils and re- cent specimens from the Antilles of C. spurca. Localities. — (Exp’d ’16) Bluff 1, Cercado de Mao; Zone I, Rio Cana at Caimito. (Rare). Cyprea spurcoides Gabb Plate 19, Figures 7, 8,9 Cyprea spurcoides Gabb, Trans. Amer. Phil. Soc., vol. 15, p. 235, 1873. Gabb remarks that the cremulations are more numerous on the inner than the outer lip of sfurcozdes, but his metatypes show the reverse. This unfigured species has not been reported out- side of Santo Domingo. Localities—(Exp’d ’16) Bluff 1, Cerado de Mao; Zone D, Rio Gurabo at Los Quemados. 116 BULLETIN 29 280 Cyprea patrespatrig, n. sp. Plate 19, Figure 10 Cyprea Isabella Gabb, Trans. Amer. Phil. Soc., vol. 15. p. 235, 1873. Not Cyprea Isabella Vinné, Syst. Nat., p. 1177, 1767. We havea specimen of Gabb’s labelled by him C. J/sabella Linné, from Santo Domingo. But on comparing it with a shell of that species from Ceylon the resemblance is only one of general type. The fossil is sub-cylindrical; aperture nearly straight, very narrow; teeth numerous, fine, thirty-three on the outer lip. Length 28, width 14, thickness 11 mm. We collected some shells resembling Gabb’s. The specific name proposed is in honor of the three liberators of the Domini- can Republic. Locality.—(Exp'd’ ’16) Bluff 1, Cercado de Mao. Cyprea dominicensis ? Gabb Plate 19, Figure 11 Cyprea Dominicensts Gabb, Trans. Amer. Phil. Soc., vol. 15, p. 236, 1873. Judging from Gabb’s brief description our specimens are his unfigured C. dominicensis. Locality.— (Exp’d ’16) Zone D, Rio Gurabo at Los Que- mados. Cyprea (Pustularia) Gabbiana Guppy Plate 19, Figure 12 Pustularia nucleus Gabb, Trans. Amer. Phil. Soc., vol. 15, p. 236, 1873. Not of Linné. . Cyprea pustulata Guppy, Geol. Mag. London, p. 440, 1874. Not of Lamarck. Cyprea Gabbiana Guppy, Quart. Jour. Geol. Soc. London, vol. 32, p. 528-529, pl. 29, fig. 10, 1876. Cyprea Gabbiana Dall, Trans. Wagner, Inst. Sci., vol. 3, pt. 1. p. 165, 1890. This beautiful little Cyprve@a resembles the recent Oriental C. nucleus. Itis very rare in Santo Domingo and has not been — found elsewhere. Locality —(Exp’d’16) Zone D, Rio Gurabo at Los Quema- dos. 281 DOMINICAN Fosstrs—MAuRY a9) Genus Trivia Gray Trivia globosa Gray Plate I9, Figure 13, Trivia globosa Gray, Sowerby’s Thesaurus, Cypreea, figs. 429, 431. Trivia globosa Dall, Bull. 37 U. S. Nat. Mus., p 136, 1889; Trans. Wag- ner Inst. Sci., vol. 3. pt. I, p. 168, 1890; Jd. pt. 6, p. 1584, 1903. We have several specimens agreeing in form and size with recent shells of 7: ¢/obosa but the furrow is not quite so deep and the ribs are worn so as to appear double. This species is living in the Antilles and is found as a fossil at Bowden. Localities— (Exp’d ’16) Zone I, Rio Cana at Caimito. (Rare). Trivia tslahtspantoleg, n. sp. Plate 19, Figure 14 Shell sub-pisiform, very ventricose, slightly produced and notched anteriorly and with the lips, especially the outer, flaring a trifle posteriorly, sharply sculptured with well defined ribs of which there are about twenty-three on the outer and twenty on the inner lip; dorsal surface evenly convex with only the faintest suggestion of a sulcus over which the ribs continue without any interruption, aperture narrow. Length of shell 7, breadth 5, alti- tude 5 mrn. This shell resembes 7. globosa but that species is smaller and the dorsal furrow is sharply cut, extending almost to the ex- tremities. Locality.—(Exp’d ’16) Bluff 3, Cercado de Mao. (Very rare. ) Trivia suffusa variety Sancti-Dominict, n; sp. Plate 19, Figure 15, Shell resembling 7. suffusa but more convex, slightly pro- duced and truncate anteriorly; outer lip somewhat elevated above the last whorl and sub-angulate posteriorly; ribs fine, 35 on the outer margin of the outer lip and 25 on the inner lip; dorsal fur- row very straight and sharp on one shell, less sharply defined on Printed Mar. 31, 1917 118 BULLETIN 29 282 the other; aperture narrow widening very slightiy anteriorly. Length 8, width 5.50, altitude 5 mm. The fossils differ from 7. suffusa, now living in the Antilles and fossil at Bowden, in their more convex form and narrower and straighter aperture. Our three species of 7vivia are the first ever found in the Santo Domingo blue clays. Locality —(Exp’d ’16) Bluff 3, Cercado de Mao. (Rare). Genus ERATO Risso Erato Maugerie variety domingensts, n. var. Plate 21, Figure 8 Shell minutely ficiform, whorls three, suture indistinct, spire very short, obtuse, last whorl very globose posteriorly, contracted and slightly produced anteriorly; aperture linear, nearly as long as the shell, margin of outer lip much thickened, minutely crenu- lated within; inner lip perfectly smooth except for a longitudinal ridge. Length4, width 3.25 mm. The species differs from £. Maugeria, which we collected on the Monte Cristi beach and is found as a fossil at Bowden, in the following respects:—it is smaller, more contracted and produced anteriorly, the inner lip is smooth and has the longitudinal ridge, while the inner lip of the recent shell has no ridge but a dozen sharp denticles extending its entire length. Locality. (Exp’d ’16,) Bluff 3, Cereado de Mao. Genus StRomBus Linné Strombus hattensts Sowerby Plate 20, Figure 1 Stroinbus hattensis Sowerby, Quart. Jour. Geol. Soc. London, vol. 6, p. 48, pl. 9, fig. 7, 1849. Strombus bituberculatus Gabb, Trans. Amer. Phil. Soc., vol. 15, p. 233 1873. Not dituberculatws Lamarck. Strombus haitensis Guppy, Quart. Jour. Geol. Soc., vol. 32, p. 521 1876. This species differs from .S. détuberculatus, of which we found beautiful shells on the Monte Cristi beach, in the following re- a 233 DoMINICAN FossILS—MAURY - bs Ne) spects:—the recent has the lobe of the outer lip more produced, the second row of spines much smaller and a third row is intro- duced at the base. Evidently it isthe direct descendant of the fossil. The latter also occurs at Bowden. Localities —(Exp’d’16) Bluff 1, Cercado de Mao; Zones A, HK, G, F, Rio Gurabo at Los Quemados. Strombus bifrons, Sowerby Plate 20, Figures 2, 3 Strombus bifrons Sowerby, Quart. Jour. Geol. Soc. London, vol. 6, p. 48, pl. 9, fig. 9, 1849. Strombus bifrons Guppy, Quart. Jour., vol. 32, p. 287, 1866. Strombus pugilis Gabb, (in part) Trans. Amer. Phil. Soc., vol. 15, Pp. 233, 1873. Not pugzlis Linné. Strombus bifrons Guppy, Quart. Jour. Geol. Soc., vol. 32, p. 521, 1876. Strombus bifrons Dall, Trans. Wagner Inst., vol. 3, pt. I, p. 176, 177, 1890; 7d. part 6, p. 1584, 1903. Sowerby distinguished his unfigured S. ambiguus from bifrons by the absence of rugations on the posterior part of the inner lip of dzfrons. But this is not a constant character. Some of our shells have five, three, none, yet evidently are the same species, and closely resemble Sowerby’s figure of dz/rons. This graceful shell is like the recent Oriental S. columba. It has a slight resemblance to Toula’s S. gatunensis, but in that species the spines on the shoulder are obsolete. Of Floridian fos- sil species it seems nearest S. Aldricht Dall. Our fossil is also found at Bowden. Localities.—(Exp’d ’16) Bluffs 1 and 3, Cercado de Mao; Zones A, E, F, Rio Gurabo at Los Quemados; Zone H, Rio Cana at Caimito. Strombus proximus Sowerby Plate 20, Figures 4, 5 Strombus proximus Sowerby, Quart. Jour. Geol. Soc. London, vol. 6, p- 48, pl. 9, fig. 8, 1849. Strombus pugilis Gabb, (in part) Trans. Amer. Phil. Soc., vol. 15, p. 233, 1873. Not pugzlis Linné. Exclude other synonyms. Strombus proximus Guppy, Quart. Jour. Geol. Soc., vol. 32, p. 521, 1876. 120 BULLETIN 29 284 Strombus pugilis Dall, (in part) Trans. Wagner Inst. Sci., vol. 3, pt. 1, Pp. 177, 1890. Not pugzlis Linné This shell has a general resemblance to S. gvacilior Sower- by, living off Panama. The spirals may, asin the type, cover the entire surface or be obsolete except on the spire. The last whorl may be deeply sculptured with grooves and cords or al- most smooth. The characters of the spire are the most contant feature. Localities —(Exp’d ’16) Bluffs 1 and 3, Cercado de Mao; Zone EH, Rio Gurabo at Los Quemados; Zone I, Rio Cana at Caimito. Strombus pugiloides Guppy - Plate 20, Figure 6 Strombus pugilis Guppy, Quart. Jour. Geol. Soc., vol. 22, p. 287, 1866. Strombus pugilis Gabb, (in part) Trans. Amer. Phil. Soc., vol., 15, p. 233, 1873. Strombus pugiloides Guppy, Geol. Mag. New. Ser. Decade 2, vol. 1, P. 433, 1874. Strombus pugilis Dall, (in part) Trans. Wagner Inst. Sci., vol. 3, pt. 1, Pp. 177, 1890. Shell resembling S. pugziis Linné, abundant on the Monte Cristi beach, but the fossil is devoid of spines and smaller, meas uring 60 X 36 against 83x52mm. The recent is the descendant of S. pugzloides just as bttuberculatus is of hattensts. _ Locality.—(Exp’d’16) Rio Cana on the Guayabin to Mao road. Strombus maoensis, n. sp. Plate 21, Figure 1 Shell rather large, remaining whorls eight, the last five ail tuberculate. On earlier whorls the tubercles aresmall, close-set and over-run by spiral threads; they gradually increase in size and diminish in number so that on the dorsal side of the last whorl there are but three or four very strong, conspicuous spines, and on the oral surface of the last whorl the spines are entirely obsolete. The spiral sculpture on the body whorl consists -of 235 DoMINICAN FossiLs-—MAURY 121 more or less obsolete, wavy ridges tending to alternate with spiral threads. Columella with a thick wash of callus, canal strongly reflexed. Length 94, width 55 mm. Our fossil resembles the recent S. (Monodactylus) gallus Linné. But on comparing it with specimens of gad/us from Tor- tola, the latter is seen to have a much narrower spire, with tuber- cles absent from the two whorls preceding the last then reappear- ing, and the body is strongly spirally sculptured. Locality.—(Exp’d ’16) Bluff 1, Cercado de Mao. Genus ORTHAULAX Gabb © Orthaulax itnornatus Gabb Plate 21, Figure 11 Oy naulee inornalus Gabb, Proc. Acad. Nat. Sci. Phila., vol. 24, p. 272, pl. 9, figs. 3, 4, 1872; Trans. Amer. Phil. Soc., vol. 15, p. 235, 1873. Orthaulax tnornatus Guppy, Quart. Jour. Geol. Soc., London, vol. 32, Pp. 520, 1876. Orthaulax tnornatus Dall, Trans. Wagner Inst. Sci., vol 3, pt. I, p. 169, 1890: Bull. 90, U. S. Nat. Mus., p. 86, pl. 11, fig. 4, 1915. The genus Orvthaulax occurs in Santo Domingo, Cuba, An- tigua, Tampa silex beds, Bainbridge (Georgia), lower bed of Alum Bluff, and the Chipola marls, Florida. It has not been found in the Bowden beds. Gabb’s species, O. zzornatus is the genotype described from Santo Domingo. Dr. Dall has found it in the White Beach limestone and the Tampa silex bed, Florida. Genus CREPITACELLA Guppy Crepitacella cepula Guppy Plate 21, Figure 9 Melanopsis cepula Guppy, Quart. Jour. Geol. Soc. London, vol. 22, p. 580, pl. 26, fig. 14, 1866. Crepitacella cepula Guppy, Geol. Mag. London, vol. 4, p. 500, 1867. Dolophanes melanoides Gabb, Proc. Acad. Nat. Sci, Phila., vol. 24, p. 272 Pleo init 7) LO 2 122 BULLETIN 29 286 Dolophanes melanioides Gabb, Trans. Amer. Phil. Soc., vol. 15, p. 235, 1873. Crepitacella cepula Guppy, Quart. Jour. Geol. Soc. London, vol. 32, p. 524, 1876. Crepitacella cepula Guppy and Dall, Proc. U.S. Nat. Mus., vol. 19, no. ILIO, p.-328, 1896. Crepitacella cepula Dall, Trans. Wagner Inst. Sci., vol. 3, pt. 6, p. 1585, 1903. For this interesting shell Gabb created in 1873 the genus Dolophanes. But Guppy in 1866 had described a similar shell from Cumana as MWelanopsis cepula, for which the following year he founded the genus Crepitacella. Guppy and Dall found the Cumana and Dominican species identical. The probable descendant is the deep sea C. Gabdz Dall, which unlike its tropical ancestor lives in nearly freezing water at a depth of 785 fathoms in sand and ooze. Localities. — (Exp’d ’16) Bluff 1, Cercado de Mao; Zone B, Rio Gurabo at Los Quemados. (Rare). Crepitacella cepula variety sptralistriata, n. var, Plate 21, Figure Io Shell resembling C. cepula Gabb, but with stronger sculp- ture, longitudinal riblets closer, higher, more conspicuously coro- nated on the shoulder angle; surface ornamented with fine, close spiral threads. Length 15, width 6 mm. Gabb found similar spirally striate specimens. Locality. —(Exp’d’16) Zone B, Rio Gurabo at Los Que- mados. (Rare). Genus TRIFORIS Deshayes Triforis Calypsonis, n. sp. Plate 21, Figure 13 Shell of medium size with slightly curving sides; suture deep; protoconch of about two whorls, each with two strong ad- jacent spirals, crossed by many oblique riblets; post-nuclear 287 DOMINICAN FosstLs—MAuRY 123 whorls thirteen, the first five with two strong spirals cut into coarse granules by the longitudinal ribs, on the following whorls a third spiral appears between the twoand on the later whorls becomes equally strong; the last volution has a peripheral spiral and two less strongly beaded basal spirals; ribs straight, twenty- one on the last whorl extending from the umbilical region across the spirals to the suture, forming square pits between the spi- rals and ribs; aperture large, round; outer lip thin, flaring, with a trace of a posterior sinus; anterior canal tubular, closed. Length 9.5, width 2.25 mm. Genus CERITHIUM Adanson Cerithium microlineatum Gabb Plate 22, Figure 1 Cerithium microlineatum Gabb, Trans. Amer. Phil. Soc., vol. 15, p. 236, 1873. This unfigured species has heretofore only been recorded by Gabb. Localities. — (Exp’d ’16) Zone D (Abundant), Zone EH (Rare), Rio Gurabo near Los Quemados. Cerithium Russell, n. sp. Plate 22, Figures 2, 3 Shell with many whorls carinated by a row of tubercles be- neath the sub-sutural sulcus; upper whorls with two narrow, well-defined varices, obsolete on the penultimate but represented on the ultimate whorl by one large, irregularly rounded varix; the first five whorls following the protoconch are ribbed, the riblets then break up into a larger and a smaller row of tubercles separated by the sub-sutural sulcus; entire surface of the shell sculptured with narrow, spiral cords; inner lip with a thick cal- lus and one posterior, elongated tooth; outer lip smooth within. Length of decollate shell 44, width 16 mm. This species is like C. microlineatum in size but distinguished by its broader form and convex whorls carinated by the main 124 BULLETIN 29 288 row of tubercles. It has somewhat the aspect of C. atratum liv- ing on the Monte Cristi beach. Our shell is named in honor of Hon. W. W. Russell, M. P.> BE. E., American Ambassador at Santo Domingo City, as a slight recognition of his very kind interest in our expedition. Locality —(Exp’d’16) Zone D, Rio Gurabo at Los Quema- dos. Cerithium unisertale Sowerby Plate 21, Figures 14, 15 Cerithium unisertale Sowerby, Quart. Jour, Geol. Soc. London, vol. 6, p. 51, 1849. Cerithium obesum Gabb (in part), Trans. Amer. Phil. Soc., vol. 15, Pees 7els7e: Not Cerithium untiseriale Gabb, Jd. p. 237. 1873. Cerithium uniseriale Guppy, Quart. Jour. Geol. Soc, London, vol. 32, p. 519, pl. 20, fig. 4, 1876. (Figure of Sowerby’s type). The true C. uniseriale Sowerby, based on Guppy’s figure of the type, can always be recognized by its short, broad form, sudden ascent of the body whorl near the aperture, and tubercu- lated whorls. It has also been found at Cumana. Localities. —(Exp’d’16) Zones B and D, Rio Gurabo at Los Quemados; Bluff 2, Cercado de Mao. Cerithium obesum Guppy ‘Plate 21, Figure 16 Cerithium obesum Gabb (in part), Trans. Amer. Phil. Soc., vol. 15, p. 237, 1873. Cerithium obesum Guppy, Quart. Jour. Geol. Soc. London, vol. 32, p. 519, pl. 29, fig. 9, 1876. Gabb’s C. obesum included C. uniseriale Sowerby (not Gabb) and obesum Gabb. The species is here limited to Guppy’s re- stricted sense. Cerithium gurabense, n. sp. Plate 22, Figures 4, 5 Cerithium unisertale Gabb, Trans. Amer. Phil. Soc., vol. 15, p. 237, 1873. 289 DOMINICAN FossiL.s—MAuRY 125 Not Cerithium uniseriale Sowerby, Quart. Jour. Geol. Soc., vol. 6, p. 51, 1849. Shell slender, high-spired; whorls ten, the first two smooth, nuclear, following whorls with fine, granular, somewhat inter- rupted spirals, and a row, sometimes doubled, of small pustules beneath the suture; aperture narrowly ovate; inner lip with a thick callus terminating in an elongated, posterior tooth. Length 18, width 7 mm. Locality- —(Exp’d’16) Zone D, Rio Gurabo at Los Que- mados. Certthium turriculum? Gabb Plate 22, Figure 6 Cerithium terriculum Gabb, Trans. Amer. Phil. Soc., vol. 15, p. 238, 1873. We have an unlabelled specimen sent by Gabb which judg- ing from his description is the unfigured C. turriculum. Cerithium domtnicense Gabb Plate 22, Figure 7 Cerithium dominicense Gabb, Trans. Amer. Phil. Soc., vol. 15, p. 238, 1873. Our shells appear to be Gabb’s unfigured C. domzintcense. Locality.— (Exp’d ’16) Zone D (Abundant), Rio Gurabo at Los Quemados. Genus Birrium (Leach) Gray Bittium asperoides Gabb Plate 21, Figure 17 Bittium asperoides Gabb, Trans. Amer. Phil. Soc., vol. 15, p. 239, 1873. We have a number of Gabb’s metatypes of this unfigured 126 BULLETIN 29 290 species and collected ourselves approximately eleven hundred shells of all sizesranging from 1.5 to 5.5mm. The smaller agree with the metatypes, which are 2-3 mm. long. I have vainly tried to separate out the larger which inter- grade and show no constant differences. They often have var- ices. The Floridian analogue is B. bozplex Dall, and the related Gatun shell is B. Scotti B. and Pils. The Dominican species has not been found elsewhere. Locality —(Exp’d ’16) Bluff 3, Cercado de Mao. (Ex- tremely abundant). Bitittum canaliculatun Gabb Plate 21, Figure 18 Bittium canaliculatum Gabb, Trans. Amer. Phil. Soc., vol. 15, p. 239, 1873: Our metatypes from Gabb show considerable variation, but one is obviously identical with our specimens. This species has not heretofore been figured. We found it a comparatively rare shell. Locality.— (Exp’d’16) Bluff 3, Cercado de Mao. Genus PoTaAMIDES Brongniart Potamides dentilabrum Gabb Certthium dentilabrum Gabb, Trans. Amer. Phil. Soc., vol. 15. p. 237, EO73.. We have an imperfect metatype from Gabb of this interest- ing, unfigured shell. The biplicate columella and dentate outer lip seem to place it in the sub-genus 7erebralia Swainson, now found in Borneo. Potamides Ormeét, n. sp. Plate 22, Figure 8 Shell rather large, solid; whorls flattened, coarsely cancel- lated by the intersection of many close-set, longitudinal ribs, 2Qz DOMINICAN FossILsS—MAuRy 127 crossed by three thick, flat, spiral cords and cut by the three grooves alternating with the cords, thus forming a tripartite series of quadrangular beads to each whorl; the uppermost cord and groove are the strongest and deepest; columella not plicate, body whorl ascending slightly and much thickened near the aper- ture. Lengte of imperfect specimen 30, greatest width 15 mm. Collected by Gabb in Santo Domingo. This species is named in honor of Mr. and Mrs. Norman Orme, La Receptoria, Puerto Plata. Genus SERPULORBIS Sassi Serpulorbis granifera Say Plate 22, Figure 9 Serpula granifera Say, Jour. Acad. Nat. Sci. Phila., ist ser. vol. 4, p. 154, pl. 8, fig. 4, 1824. Reprint Bull. Amer. Paleont. No. 5, 1896. Vermetus decussatus Gabb, Trans. Amer. Phil. Soc,, vol. 15, p. 240, 1873. Not V. decussatus Gmelin. Serpulorbts granifera Dall, Trans. Wagner Inst. Sci., vol. 3, pt. 2, Pp. 303, 1892. Anguinella virginiana Whitfield, Mon. 24 U. S. Geol. Survey, p. 132, pl. 24, figs. 1-5, 1894. Vermetus graniferus Martin, Maryland Gecl. Survey, Miocene, p. 232, pl. 54, figs. 14, 15, 1904. Our Dominican specimens are very like S. granzfera tenera Dall from the Upper Miocene of North Carolina. They are not identical with the recent Antillean species, S. decussatws Gmelin. Localities.—(Exp’ ’16) Rio Cana, Guayubin to Mao road; Zone B, Rio Garabo at Los Quemados. Serpulorbis papulosa Guppy Plate 22, Figure Io Vermetus papulosus Guppy, Quart. Jour. Geol. Soc., vol. 22, p. 292, pl. 17, fig. 3, 1866. Petaloconchus sculpturatus Gabb, Trans. Amer. Phil. Soc., vol. 15, p. 241, 1873. Vermetus papulosus Guppy, Quart. Jour. Geol. Soc., vol. 32, p. 519, 1876. 128 BULLETIN 29 262 Serpulorbis papulosus Dall, Trans. Wagner Inst., vol. 3, pt. 6, p. 1585, 1903. Guppy described a slender tip from Bowden. His figure is very ‘misleading, but he describes the characteristic rows of tu- bercles interlined with crenate strie. Our party found this spe- cies in place up to eighteen inches in length but too fragile to se- cure entire. Localities. — (Exp’d ’16) Rio Cana, Guayubin to Mao road (very fine); Zone F, Rio Gurabo at Los Quemados. Genus PETALOCONCHUS Lea Petaloconchus domingensis Sowerby Plate 22, Figure 11, Petaloconchus domingensis Sowerby, Quart. Jour. Geol. Soc. London, vol. 6, p. 51, pl. 10, fig. 8, a, b, c, 1849. Petaloconchus sculpturatus Gabb, Trans. Amer. Phil. Soc., vol. 15, p. 240, 1873. Not sculpturatus Lea. Fetaloconchus sculpturatus Guppy, Quart. Jour. Geol. Soc., vol. 32, p. 519, 1876. Vermetus ( Petaloconchus) scuipturatus Dall (in part), Trans. Wagner Inst., vol. 3, pt. 2, pp. 305, 306, 1892. Petaloconchus domingensis Brown and Pilsbry, Proc. Acad. Nat. Sci: Phila., p. 359, I9II. Petaloconchus domingensis typically coils in a widening cy- linder, with whorls much flattened on the sides and angulate at the base. P. sculpturatus coils.in a tapering cone, with whorls less flattened and more convex at the base. P. domingensis oc- curs at Bowden; Trinidad (Caroni Series); and Gatun. Localities. — (Exp’d ’16) Zone B, Rio Gurabo at Los Que- mados; Bluff 1, Cercado de Mao. : Petaloconchus Laddfrankline, n. sp. Plate 22, Figure 12 Shell delicate, slender, gracefully spirally undulating. Sur- face regularly and elegantly ornamented with many close, equi- distant, longitudinal beaded cords which conform to the spira 293 DOMINICAN FossILs-—-MAURY 129 undulations of the tube. The intervals between the cords are about equal in width to the cords and are smooth except for very fine transverse stric. At one end two septa are visible within the tube, which indicates that the shell belongs to Lea’s Petaloconchus. Diameter of tube 2, length 30 mm. Named in honor of Mrs. Christine Ladd-Franklin. Locality. — (Exp’d ’16) Zone E, Rio Gurabo at Los Que- mados. (Rare). Genus SILIQUARIA Lamarck Siliquaria gurabensis, n. sp. Plate 22, Figure 13 Shell small, irregularly spirally convoluted. Apex blunt, convex; whorls nearly smooth, marked only by microscopic transverse growth-lines and by a few, faint, nearly obsolete lon- gitudinal striations. Fissure narrow, in the early whorls repre- sented by a series of minute perforations, in the later whorls these pores are entirely closed over, the margin of the slit being irregularly crenulate. Greatest diameter of tube 2.5 mm. This genus has never before been reported from Santo Do- mingo. It is very rare in the American Tertiaries. Locality. — (Exp’d’16) Zone D, Rio Gurabo at Los Que- mados. Genus TURRITELLA Lamarck Plate 22, Figure 14 Turritella planigyrata Guppy, Proc. Scient. Assoc. Trinidad, p. 169, 1867. Turritella planigyrata Guppy, Geol. Mag. London, p. 408, pl. 18, fig. 5, 1874. (Very poor figure). Turritella planigyrata Gabb, Trans. Amer. Phil. Soc., vol. 15, p. 240, 1873. Turritella planigyrata Guppy, Quart. Jour. Geol. Soc., vol. 32, p. 519, 1876. Our shells seem identical with Guppy’s type from the Caroni Series, Trinidad. The Gatun analogue is 7. gatunenszs Conrad, 130 BULLETIN 29 294 which has much more deeply excavated whorls. Locality. — (Exp’d ’16) Bluff 2, Cercado de Mao. Turritella tornata Guppy Plate 22, Figure 15 Turritella tornata Guppy, Quart. Jour. Geol. Soc. London, vol. 22, p. 580, pl. 26, fig. 12, 1866. Turritella tornata Gabb, Trans. Amer. Phil. Soc., vol. 15, p. 240. 1873. Turritella tornata Dall, Trans. Wagner Inst., vol. 3, pt. 2, p. 312 ,1892; Id. pt. 6, p. 1585, 1903. Turritella tornata Brown and Pilsbry, Proc. Acad. Nat. Sci., Phila., Pp. 359, IOII. The beads on our specimens are not so large as on the type from Cumana; but the description otherwise fits exactly. 7. tornata is of the same group as Conrad’s 7. altilirva from Gatun and Heilprin’s 7. perattenuata from the Florida Pliocene, but both these species are very much larger with coarser, bolder sculpture. Localities. — (Exp’d’16) Zones D and E, Rio Gurabo at Los Quemados. Turritella submortont, n. sp. Plate 22, Figure 16 Shell turreted, the whorls increasing rapidly, excavated above the suture and sharply carinated at their anterior fourth by a ridged spiral thread, posterior to this carina are five or six less prominent spirals and anterior to it are two, making about eight in all. Some or all of the spirals are microscopically beaded. Length of incomplete shell 25, greatest width 9 mm. Some of the later Lignitic and early Claiborne specimens of T. Mortont resemble this species. One set collected by Professor Harris in Newcastle, Virginia, are strikingly like in surface mark- ings and general aspect. The Gatun analogue of the Dominican species is 7. mzmetes Brown and Pilsbry. Localities. —(Exp’d ’16) Zones D add E, Rio Gurabo at Los Quemados. 495 DOMINICAN FossILs—MAuRY 131 Genus SOLARIUM Lamarck Solarium quadriseriatum Sowerby Plate 23, Figures I, 2 Solarium quadriseriatum Sowerby, Quart. Jour. Geol. Soc. London, vol. 6, p. 51, pl. 10, fig 8 a, b, c, 1849. Solarium quadriseriatum Guppy, Quart. Jour. Geol. Soc., vol. 22, p. 291, 1866. Architectonica quadriseriata Gabb, Trans. Amer. Phil. Soc., vol. 15, p. 228, 1873. Solarium quadriseriatum Guppy, Geol. Mag. London. p. 438, 1874. Solarium granulatum Dall (in part) Trans. Wagner Inst. Sci., vol. 3, pt. 2, p. 392, 1892. Not S. granulatum Lamarck. Solarium quadriseriatum Dall, Trans. Wagner Inst., vol. 3, pt. 6, p. 1585, 1903. This pretty species is not uncommon in Santo Domingo and occurs at Bowden, Anguilla and the Caroni series of Trini- dad. f Localities—(Exp’d’16) Bluffs 1 and 3, Cercado de Mao; Zone A and B, Rio Gurabo at Los Quemados. Solarium granulatum Lamarck Plate 23, Figure 3, Solarium granulatum Wamarck, An. sans Vert., vol. 7, p. 3, 1822; Ency. Method, pl. 446, fig. 5 a-b, 1792. Architectonica perspectiva Tuomey and Holmes, Pleioc. Foss. S. Car., p. 120, pl. 26, fig. 6, 1857. Not. S. perspectiva Linné nor Lamarck. | Solarium granulatum Dall (in part) Trans. Wagner Inst. Sci., vol. 3, Pp. 2, p. 329, 1892. Solarium gatunensis Toula, Jahrb. der K.—K. Geol. Reichsanst. Wien, vol. 58, p. 693, pl. 15, fig. 3, 1908. Our shell almost exactly matches a specimen of S. gvanzu- latum from Alum Bluff, Florida, and is so like Toula’s S. gatu- nensis that it seems also identical with the Gatun form. S. granu- latum ranges from the Oligocene to the recent. It is living in the Antilles. Locality.—(Exp’d 16) Zone I, Rio Cana at Caimito. 132 BULLETIN 29 296 Solarium Stonemaneé Plate 23, Figures 4, 5 Shell conic, depressed, whorls six, handsomely ornamented with oblique, radiating plications often divaricating, cut just above the suture by a single impressed spiral line, thus forming a revolving row of fine beads beneath which, on the periphery of the last whorl, are three more beaded spirals, progressively finer, all three extending into the aperture; perpihery rounded; under surface sculptured with radiating, divaricating plications similar to those on the upper surface; the shell is so deeply per- forated that one can look through to the apical volution; margin- al teeth small, numerous. Greatest diameter 15, height 9 mm. This species has a slight general resemblance to Conrad’s S. trilineatum. This rare and exquisite shell is named in honor of Dr. Ber- tha Stoneman, Huguenot College, University of the Cape of Good Hope. Locality.—(Exp’d’16) Bluff 3, Cercado de Mao. Genus Rissoina d’Orbigny Rissoina crasstlabris Gabb Plate 21, Figure 19 Eulima crassilabris Gabb, Trans. Amer. Phil. Soc., vol. 15, p. 227, 1873. Cf. Hulima crassilabyis Gabb, Jour. Acad. Nat. Sci. Phila., vol. 8, sec. ser., p. 358, pl. 46, fig. 43, 1874—1881. (Pliocene Moen shell). The thickened outer lip seems so characteristic of Rzssoina that the species is here referred to that genus. Localities —(Exp’d ’16) Bluff 3, (Abundant), Bluff 2, (Rare), Cercado de Mao. Rissoina Sagraiana d’Orbigny Plate 21, Figure 20 kissoina Sagraiana d’Orbigny, Hist. Nat. y Pol. Isla de Cuba, vol. 5, Pp, 162, 1845; A. Sagra in Atlas 8, Mollusca, pl. 12, figs. 4, 5, 1855. Rissotna Sagraiana Dall, Bull. 37 U. S. Nat. Mus., p. 150, 1889. 297 DOMINICAN FossiLts—MAuRY 133 Rissoina Sagraiana Guppy and Dall, Proc. U. S. Nat. Mus. No. 1110, vol. 19, p. 322, 1896. Rissoina Sagraiana Dall, Trans. Wagner Inst. Sci., vol. 3, pt. 6, p. 1585, 1903. This species is referable to the section Phostnella Moerch. The shell was first described from the recent fauna of Cuba. It has been found at Bowden, but not heretofore in the Dominican blue clays. It may here be noted that Gabb’s genus /ofszs was founded according to Guppy and Dall ona young /7ssozma and is inval- id. Gabb’s unfigured Cevithidea minuta seems to be also a Res- soina. Locality —(Exp’d’16) Bluff 3, Cercado de Mao. (About 50 specimens). Bluff 2 (Comparatively rare.) Genus Cruc1BULUM Schumacher Crucibulum (Dispotea) cf. prleolum Plate 23, Figure 6 We collected twenty-five specimens of a Crucibulum appar- ently closer to the young of C. pzleolum than to any other species. Our shells are usually entirely smooth, but a few show the irreg- lar undulations characteristic of the adult pzleolum. They are not C. spinosum with which Gabb identified his Dominican spec- imens. They may be a new species. Localities. —(Exp’d’16) Bluffs 2 and 3, Cercado de Mao. Genus XENOPHORA Fischer de Waldheim Xenophora conchyliophora Born Trochus conchyliophorus Born, Mus. Cees. Ind., p. 333, 1778. Trochus agglutinans Lamarck, Anim. sans Vert. 7, 14. Phorus agglutinans Gabb, Trans. Amer. Phil. Soc., vol. 15, p. 241, 1873. Xenophora conchyliophora Dall, Trans. Wagner Inst. Sci., vol. 3, pt. 2, pp. 360-362, 1892: Bull. 90, U. S. Nat. Mus., p. 105, pl. 15, figs. Hy anion ES, We secured a quantity of these shells on the beach at Monte Cristi identical with the fossils from the blue clays. 134 BULLETIN 29 298 Localities.— (Exp’d ’16) Zone E and F, Rio Gurabo at Los Quemados. ‘enophora delecta, Guppy Plate 23, Figures 8, 9 Fhorus delectus Guppy, Quart. Jour. Geol. Soc., vol. 32, p. 529, 1876. Xenophora dilecta Dall, Trans. Wagner Inst. Sci., vol. 3, pt. 6, p. 1585. This shell is easily distinguished from X. conchyliophora by its strikingly ridged upper surface and rows of granules on the under surface. Guppy’s type was one of Heneken’s Dominican shells, but it also occurs at Bowden. Localities. —(Exp’d’16) Bluff 1, Cercado de Mao; Zone F, Rio Gurabo. Xenophora (Turgurium) imperforata Gabb Onustus tmperforatus Gabb, Trans, Amer. Phil. Soc,, vol. 15, p. 241, 1873. This shell can be immediately recognized by the prolonga- tion of the periphery into the blade-like flange characteristic of Turgurium. On comparing it with the recent Antillean 7. cari- be Petit, of which we have a metatype from Petit, the fossil is seen to be broader, flatter and more coarsely striate. Locality.—(Exp’d’16) Zone F, Rio Gurabo at Los Que- mados. Genus NaTIca Scopoli Natica canrena (Linné) Moerch | Plate 23, Figure ro Nertia canrena (Vinné in part) Auct., Morch, Malak. Blatt. 24, p. 62, 1877. Natica canrena Gabb, Trans. Amer, Phil. Soc., vol. 15, p. 223, 1873. Natica canrena Guppy, Quart. Jour. Geol. Soc., vol. 32, p. 518, 1876. Naticacanrena Dall, Trans. Wagner Inst. Sci., vol. 3, pt. 2, p. 364-365, 1892. Natica pe Brown and Pilsbry, Proc. Acad. Nat. Sci. Phila., p. 508, 1912. Shell easily distinguished by the characteristic tangential plicee adjoining the suture. It is a widespread and ancient species, ranging from the Oligocene to the recent, found in Flori- da, North Carolina, Costa Rica, Trinidad and at Gatun. It is 299 DOMINICAN FossIrts—MAuURY 126 living in the Antilles and south to Pernambuco. Localities.— (Exp’d ’16) Bluff 1, Cercado de Mao; Zone I, Rio Cana; Sandy clays, Rio Cana. Natica Young? n. sp. Plate 23, Figures II, 12 Shell subglobular, with five rounded whorls; suture well-de- fined; surface smooth except for growth-lines; aperture semi- lunar; posterior callus of inner lip thickest at the angle of the aperture; umbilical callus coiled on the umbilical wall near the base, leaving the upper partof the umbilicus entirely open. Var- ious specimens give the following heights and widths: 23 X 22, D7 xeOs 22952 le TIM This species resembles the Jacksonian Hocene, JV. permunda Conrad, and to a less degree, the Chipolan Oligocene JV. alfical- fosa Dall. But the former has the callus coiled on the middle of the wall, and the iatter at the upper end, while our shell has it coiled near the base. Doubtless V. permunda is the precursor of the Dominican shell. This species is named in honor of Professor Young, South African College, Cape Town. Localities—(Exp’d ’16) Zones A, B, E, F, G, Rio Gura- bo at Los Quemados; Bluffs 1, 2, Cercado de Rio Mao; Zone I, Rio Cana at Caimito. Natica (Stigmaulax) sulcata Born Plate 23, Figure 13 Natica sulcata Born, Mus. Czes. Vindobonensis, pl. 17, figs. 5, 6. Natica sulcate Guppy, Quart. Jour. Geol. Soc. London,vol. 22, p. 290, pl. 18, figs. 14, 15, 1866. Natica sulcata Gabb, Trans. Amer. Phil. Soc., vol. 15, p. 233, 1873. Natica sulcata Guppy, Geol. Mag. Lendon, p. 437, 1874; Quart. Jour. Geol. Soc., vol, 32, p. 518, 1876. Natica (Stigmaulax) sulcata Dall, Trans. Wagner Inst. Sci., vol. 3, pt. 2, p. 366, 1892; /d. pt. 6, p. 1585, 1903. This handsome grooved species attained a large size and is abundant in the blue clays. It has been found at Bowden and Cumana and is still living in the Antilles. 136 BULLETIN 29 300 Localities—(Exp’d ’16) Bluffs 2, 3, (Very abundant) Cer- cado de Mao; Rio Cana, Gravels; Rio Cana, Sandy clays; Zones H and I, Rio Cano at Caimito; Zones E and G, Rio Gurabo at Los Quemados. Genus Poxtinices Montfort Polinices subclausa Sowerby Plate 23, Figure 14 Natica subclausa Sowerby, Quart. Jour, Geol. Soc. London, vol. 6, p. 51, 1849. Natica subclausa Guppy, Quart. Jour. Geol. Soc., vol. 22, p. 290, pl. 18, fig. 8, 1866. Mammilla mamillaris Gabb (in part), Trans. Amer. Phil. Soc., vol. 15, p. 223, 1873. Not P. mammuillaris Lamarck. Natica subclausa Guppy, Geol. Mag. London, p. 437, 1874; Quart. Jour. Geol. Soc., vol. 32, p. 519, 1876. Polyntces subclausa Dall, Trans. Wagner Inst. Sci., vol 3, pt. 6, p. 1585, 1903. Polinices subclausa Brown and Pilsbry, Proc. Acad. Nat. Sci. Phila., p 360, I9QIl. We collected shells of P. mammillaris Lamarck on the Monte Cristi beach. They are much larger than the fossils and light orange brown, not striped. Some of the fossils retain their color pattern of gray stripes on a white background. These differences indicate that Sowerby’s species is distinct from the recent ana- logue. P. suclausa has been found at Bowden and Gatun and is abundant in Santo Domingo. Localities.—(Exp’d’16) Zones H and I, Rio Cana at Cai- mito; Gravels and sandy clays of Rio Cana; Bluffs 2 and 3, Cer- cado de Mao; Zones D and E, Rio Gurabo at Los Quemados. Polinices Stantslas-Meunieri Plate 23, Figures 15, 16 Shell ovate, with five and a half rounded whorls; spire conic; entire surface smooth except for growth-lines; body whorl very slightly concave in front of the suture, elsewhere evenly rounded, aperture semi-circular; inner lip with a thick posterior callus ex- (ea ies) es) DOMINICAN Fossits-—MAuRY Wa) tending without interruption half of the distance from the angle of the aperture to the base, and concealing the upper part of the perforation; the callus is then reduced to half its width by a rect- angular truncation. Altitude 36, width 28 mm. It is with the greatest pleasure that Iname this shell in honor of Monsieur Stanislans-Meunier of Paris, as a token of highest esteem and friendship, and a souvenir of his charming expédztzons glologiques. Locality.—(Exp’d ’16) Rio Cana, Cerro Gordo to Mao road (Guayubin to Mao telephone line). Subgenus NeverIvTA Risso Neverita nereidis, n. sp. Plate 23, Figures 17, 18 Shell greatly flattened, smooth except for fine arcuate growth-lines which are strongest on the under surface; whorls five, the first two minute, conical, subsequent volutions flattened above, concavely excavated beneath; umbilicus partly overhung by atongue-like callus capping the pillar-like umbilical callus which enters and stops up the perforation; aperture large; outer ip slightly sinuous beneath the periphery; the under surface and interior of some specimens show traces of an original chestnut color. Diameter of largest shell 36, altitude 12 mm. The nearest ally of this fine shell is Humboldt’s larger species, JV. glauca, living from Acapulco to Panama. Localities. — (Exp’d’16) Zones H and I, Rio Cana at Caimito (The most characteristic fossil of the upper Cana). Genus AMAuROopPSIS Moerch Amauropsis Guppyt Gabb Plate 23, Figure 19 Natica phastanelloides Guppy, Quart. Jour. Geol. Soc. London, vol. 22, p.17, fig. 1, 1866. Not V. Phasitanelloides d’Orbigny, De la Sagra, Hist. Pol.y Nat. Isla de Cuba, Atlas 8, Palzeont, Tab. 1, iW Fe Amaura Guppyt Gabb, Trans. Amer. Phil. Soc., vol. 15, p. 224, 1873. Natica phasianelloides Guppy, Quart. Jour. Geol. Soc., London, vol. 138 BULLETIN 29 302 32, p. 519, 1876. Ampullina Guppyt Dall, Trans. Wagner Inst., Sci., vol. 3, pt. 6, p 1585, 1903. Closely allied to the Eocene A. jacksonensis Harris and to the Gatun Lupia perovata Conrad. A. Guppyi occurs in Anguilla, the San Fernando beds of Trinidad, and those of Bowden. The genus is now limited to the Arctic seas. ‘ Localities.—(Exp’d ’16) Bluffs 1 and 2, Cercado de Mao; Zones H and I, Rio Cana at Caimito; Rio Cana gravels; Zone G, Rio Gurabo at Los Quemados. Amauropsis Guppyt variety gurabensts, n. vat. Plate 23, Figure 20 Shell imperforate, with a short, sharp spire and ventricose body whorl; suture impressed; whorls eight, very markedly flat- tened in front of the suture giving a decidedly shouldered aspect; aperture very large. Length 35.5, of spire 11.5, of aperture 24 mm. Extreme forms are very unlike typical shells of 4. Guppyt but intergrade. The nearest ally is the smaller 4. flovi- dana Dall from the Tampa silex bed. Locality.—(Exp’d ’16) Zone G, Rio Gurabo at Los Que- rmados. Genus Sinum Bolten Sinum gatunense Toula Plate 24, Figure 2 Sigaretus (Lupita Conrad) gatunensis ‘Toula, Jahrb. der K—K Geol: Reichsanstalt Wien, vol. 58, p. 697, pl. 28, fig. 3, 1908. Our shells agree so well with Toula’s figure and description of S. gatunense that they seem identical. | They are also closely related to the recent S. perspectivum. Guppy’s excentricum seems about intermediate between this and the following species and differs from both in ornamentation. Localities —(Exp’d’16) Zone G, Rio Gurabo at Los Que- mados; Bluff 3, Cercado de Mao. 303 DOMINICAN Foss1rs—MAuURY 139 Sinum Nolan, n. sp. Plate 24, Figure 1 Shell convex, almost imperforate, translucent yet fairly sub- stantial; spire low, whorls four, the earlier smooth, later volu- tions so very faintly striated asin some lights to appear smooth, but under a lens their surface is seen to be covered with exces- sively fine, wavy, spiral threads; aperture large, the spreading outer lip joining the body above the periphery of the preceding whorl; inner lip somewhat thickened; there is a mere chink or suggestion of aperforation. Greatest diameter 19, of aperture Hele TTT. In general outline, convexity and appearance of the spire this shell resembles the larger, recent Oriental species, S. /evz- gatum Recluz, but our fossil is even less faintly striated than that shell. The Floridian fossil analogue is S. chipolanum Dall. S. Gabbi Pilsbry and Brown seems to be a pigmy relative, but the perforation is relatively much larger. I take great pleasure in naming this rare shell in honor of Dr. Edward J. Nolan, of the Academy of Natural Science, Philadel- phia. Loeality.—(Exp’d’16) Zone E, Rio Gurabo. D. SUPER-FAMILY PTENOGLOSSA Genus EPitromMiumM Bolten Epitomium minutissimum Gabb Plate 24, Figure 3 Scalaria minutissima Gabb, Trans. Amer. Phil. Soc., vol. 15, p. 224, 1873. Distinguished by its slender form and blade-like lamellce toothed at the shoulders of the whorls. Our shells answer well to Gabb’s description of this unfigured species. Localities —(Exp’d’16) Bluff 3, Cercado de Mao (Rare). Epitomium riparum, n. sp. Plate 24, Figure 4 Shell with convex whorls, adorned by many low lamelle, 140 BULLETIN 29 304 their edges curled laterally so as to appear from above rounded and slightly flattened, lamellee numbering about nineteen on the last whorl; under the microscope the spirals in the interspaces appear as raised flat threads, a little stronger than in Z. mznutzs- simum, each whorl usually also has a single heavy, rounded opaque white varix which on the body whorl marks the termina- . tion of the outer lip, but one shell has two additional varices on the last whorl, all three being on the latter third of the volution; all the sculpture extends to the base of the shell, aperture round, lip thickened, continuous. An incomplete shell of six whorls measures 7X3mm. The style of sculpture resembles that of the recent £. gracilentum Gould. Our shell can be recognized by its many low lamelle, fine spirals and rounded white varices. Locality.—(Exp’d’16) Bluff 3, Cercado de Mao. Epitomium cercadicum, n. sp. Plate 24, Figure 5 Shell rather broadly conic; apex lost, remaining whorls six, convex, adorned with blade-like lamelle, thirteen on the last whorl, which are not denticulate at the shoulder nor hooked at the suture, but simple and continuous or subcontinuous, from whorl to whorl; the lamellze appear to be made up of a single sheet each; spirals nearly obsolete, exceedingly faint even under strong magnification; the interspaces shining and polished; suture deep; aperture rounded; lip thickened, the thickening interrupted at its contact with the body whorl. Length of decollate shell 6.25, greatest width 3 mm. The broader basal whorl, more rapidly tapering spire, and blade-like, subcontinuous, simple, not toothed lamellee differenti- ate this species. Locality —(Exp’d’16) Bluff 3, Cercado de Mao. (Rare). Epitomium textuvestitum, n. sp. Plate 24, Figure 6 hell extremely long and slender; suture constricted, some- 305 DoMINICAN Foss11s—MAuRY 141 what obscure; whorls twelve to thirteen, the first three ‘smooth, nuclear; post-nuclear whorls convex, ornamented with many, close-set, undulating, longitudinal ribs (fourteen on the last whorl) which on thelater volutions usually either do not quite extend to the upper (posterior) suture, or else are suddenly bent to the left and diminished on approaching it; the entire surface of the shell, excepting only the protoconch, exhibits under the lens a most curious texture which might be likened toa woven cloth in which the woof (representing the spirals) is some- what coarser than the warp; there is one heavy, rounded varix to each volution, that of the last whorl bordering the lip, but those of the preceding whorls forming a more or less continu- ous line ascending obliquely up the shell; aperture small, ovate; lip bordered by a very thick, minutely crenulated, platform-like varix sunken a trifle below the level of the lip. Length 16, width 4.75 mm. This curious species is characterized by its singular texture and extraordinary lip recalling that of Czvsotrema Moerch, but the shell is not cancellate as in that section. A species slightly resembling our fossil was dredged by the Blake in 100 fms. off Barbados and described by Dallas Scala hellentca var. Moerch- Zana, Locality. —(Exp’d’16) Zone E, Rio Gurabo, at Los Que- mados (Rare). Genus Ac is Lovén Acts acuminatotdes, n. sp. Plate 24, Figure 7 Shell minute, polished and shining, apex broken, remaining whorls seven and a half, slightly convex especially anteriorly, en- tirely smooth and without ornament; suture distinct, linear, not channeled. Length of shell 3.6, greatest diameter .75 mm. This species is named from its resemblance to the Jamaican Aclis acuminata Guppy but that is characterized by its over- hanging whorls, while ours only widen very slightly anteriorly, are more closely coied, flatter, and not so constricted at the 142 BULLETIN 29 306 suture. Evidently our shell is distinct from the unfigured A. politz since Gabb emphasizes its channeled suture not present in ours. Locality. —(Exp’'d’16) Bluff 3, Cercado de Mao. DO SORER FAVILSG GYTINOGEOSSA Genus MELANELLA Bowdich Melanella (Eulima) cercadica, n. sp Plate 25, Figure 1, Eulima acicularis Gabb, Trans. Amer. Phil. Soc., vol. 15, p. 227, 1873. Not “ulima acicularis A. Adams, Aun. and Mag. Nat. Hist., p. 125, 1861. As Gabb’s name was preoccupied by Adams, a new name is needed and cervcadica seems appropriate. Gabb’s species robusta was also preoccupied by Adams in 1861. M. cercadica resembles the recent dzfasciata d’Orb. (acuta Sowerby) but the latter is not constricted at the suture, is small- er, and has a spiral line of color, whereas our shells show traces of a band of fulvous yellow in the constricting zones. Locality—(Exp’d ’16) Bluff 3, Cercado de Mao. Melanella (Eulima) maoica, n. sp. Plate 25, Figure 2 Shell small, moderately slender, solid, polished; whorls elev- en, the apical large, knobbed, the second convex, projecting; sub- sequent whorls straight, their width two and a third times their axial height; suture distinct, slightly overhanging the following whorl; aperture small, outer lip thin, a little inflated, oblique, ar- cuate, slightly produced anteriorly. Length of shell 4.10, of body whorl 1.50, of aperture .g0, greatest diameter 1.10 mm. The most characteristic feature of this species is its large knobbed nucleus. Locality—(Exp’d ’16) Bluff 3, Cercado de Mao. 307 DOMINICAN FossILS—MAvuRY 143 Melanella (Eulima) jacululum, n. sp. Plate 25, Figure 3 Shell small, slender, solid, porcellanous; whorls about twelve, their width nearly twice their height, their sides flattened, some- what overhanging the following volutions; suture distinct, trans- verse; base of body whorl rounded; aperture small; outer lip thin, arcuate, slightly produced anteriorly; the shell shows traces of arosy band near the suture. Length of shell 4.25, of body whorl 1.50, of aperture .70; greatest width 1.25 mm. This species is characterized by its overhanging whorls. Locality. — (Exp’d ’16) Bluff 3, Cercado de Mao. Melanella (Eulima) Tethyos, n. sp. Plate 25, Figure 4 Shell small, slender, surface entirely smooth, whorls about twelve, their sides straight, their axial height being equal to one- half their width; suture distinct, transverse; base of body-whorl rounded; aperture small; outer lip simple, slightly oblique, arcu- ate, hardly produced anteriorly; inner lip with a small callus, wider on the columella. Length of shell 6.60, of body whorl 1.25, of aperture 2.25; diameter 1.85 mm. Locality.— (Exp’d ’16) Bluff 3, Cercado de Mao. Genus Niso Risso Niso grandis Gabb Plate 24, Figure 8 Niso grandis Gabb, Trans. Amer. Phil. Soc., vol. 15, p. 227, 1873. Niso grandis Dall, Trans. Wagner Inst. Sci., vol. 3, pt. 6, p. 1584, 1903. Gabb’s shell was unusually large with a diameter of 13 mm. As none of ours attained this size I felt some doubt of their iden- tity with Gabb’s and asked Dr. Dall’s opinion. He pronounced our shell V. gvandis. Localities —(Exp’d ’16) Zone I, Rio Cana at Caimito; Bluff 3, Cercado de Mao; 144 BULLETIN 29 208 Genus PyRAMIDELLA Lamarck Pyramidella canaliculata Gabb Plate 25, Figure 5 Obeliscus canaliculatus Gabb, (in part) Trans. Amer. Phil. Soc.,’ vol. 15, Pp. 225, 1873. Obeliscus canaliculatus Dall, Trans. Wagner Inst. Sci., vol 3, pt. 2, p. 247, 1892. Gabb’s description of O. canaliculatus comprises a number of different forms, some of which we also collected. Dr. Dall’s re- mark concerning the type corresponds. He says, (Trans. Wag- ner Inst Scie) voll 3. pt.) 2.) p. 247) 1692). baeisipposed ites at Philadelphia comprise three or four species belonging to several distinct genera, all loose in one tray together.’’ I have here re- stricted the species canaliculata to the following form, chosen from its possessing the more striking of the characters enumer- ated by Gabb. Shell elongate-conic, slender, nuclear whorls two, subsequent whorls thirteen, flattened, shouldered at the summit which is minutely crenulated; suture deeply channeled, the center of the channel being occupied by a fine sutural thread; periphery of last whorl sulcate; base rounded; perforation minute, surrounded by a stout fasciole; aperture oval; columella slender, with one trans- verse, lamellar, posterior plication and two oblique folds below, the anterior of which borders the canal; outer lip thin, with two or three denticles, a varying distance within. Length 11, diam- eter 4mm. This species somewhat resembles the recent P. pana- mensis Bartsch, dredged off Panama. Sowerby described as canaliculatus an entirely different species from the Sandwich Islands (Proc. Zool. Soc., London, for 1873) but apparently this was not published until early in 1874, so that Gabb’s name has priority. Locality.—(Exp'’d ’16) Bluff 3, Cercado de Mao. Pyramidella semicanaliculatas, n. sp, Plate 25, Figure 6 Shell resembling P. canaliculata but differing markedly in 309 DOMINICAN FossILs-——-MAuRY T45 the character of the suture. In P. canaliculata the whorls are ex- cavated both above and below the sutural thread thus forming a double channel in the center of which the sutural thread lies. In this shell the whorls are excavated only de/ow the sutural thread so that the channel is single and the sutural thread lies just pos- terior to it; whorls thirteen; columella tri-plicate; outer lip with several denticles; shell minutely perforate, the perforation bor- dered by a fasciole. Length 9.5, diameter 3 mm. This species resembles P. forulata Guppy from Bowden; but our fossil is nearly twice as long, and with a much higher spire. Locality.k—(Exp’d’16) Bluff 3, Cercado de Mao. Pyramidella diademata, n. sp. Plate 25, Figure 7 Shell siender, sub-perforate, resembling P. seimzcanaliculata but the sutural channel is deeper and the summit of the whorls is strongly crenulated, and even the peripheral sulcus on the last whorl is distinctly crenulated on its anterior border; whorls eleven exclusive of the small, helicoid protoconch of about two addition- al volutions; columella with three folds, the posterior nearly trans- verse, the two anterior oblique and proximate; outer lip typically with four strong denticles. Length of shell 9.25, greatest diam- Guse 2 saakaal, The distinguishing feature in this pretty species is its strongly crenulate subsutural border. Locality —(Exp’d’16) Bluff 3, Cercado de Mao. Pyramidella Olssonz, n. sp. Plate 25, Figure 8 Shell elongate-conic, slender, with fourteen whorls, proto- conch helicoid, its axis lying at an angle to the main axis of the shell; post-nuclear whorls flattened, slightly shouldered, very weakly and minutely crenulated at the summit; suture narrowly but rather deeply channeled; periphery of last whorl marked by a fine, distinct revolving rib; base rounded; aperture narrowly oval; columella tri-plicate, the two anterior folds oblique, parallel, the 146 BULLETIN 29 310 posterior slightly oblique; outer lip typically with three denticles within, the stronger posterior; basal fasciole present; shell scarce- ly, if at all, perforate.. Length 10, diameter 3 mm. _ This species is distinguishable by the presence of the fine re- volving rib.on the periphery of the last fwhorl, which takes the place of the sulcus in P. canaliculata and semicanaliculata. a shell is dedicated to Mr. Axel Olsson by whom it was ound. Locality.— (Exp'd °16) Bluff 3, Cercado de Mao. Pyramidella (Callolongcheus) cercadensis, n. sp. Plate 25, Figure 9 Shell related to P. jamaicensis Dall, but slenderer and more rudely sculptured; protoconch small and immersed; post-nuclear whorls eight, convex, not flattened as in jamaicensis; periphery of last whorl marked by an incised spiral line or narrow sulcus; the preceding whorls are wound at a distance equal to one-third of the whorl in front of the peripheral sulcus; suture channeled and the anterior border is very minutely crenulated; columella with a large posterior, horizontal fold and two oblique anterior folds, the most anterior being very weak, scarcely discernible; base of body whorl rounded; outer lip with two denticles, the posterior much the larger; surface of shell polished, marked by growth-lines and by very faint spiral strize. Length of shell 4.25, width 1.40 mm. Locality. —(Exp’d’16) Bluff 3, Cercado de Mao (Rare). Pyramidella (Orinella) Arionis Plate 25, Figure 10 Shell small, slender, short, smooth and porcellanous; suture distinct, whorls seven plus the rather large protoconch; the latter is helicoid and consists of about one and a quarter visible whorls, half immersed; post-nuclear whorls with their sides flattened, somewhat turreted, axial height of each whorl equal to about half its width; aperture small, columella with one large, promi- nent plication. Length of shell 3.25, of body whorl 1.15, of 3iI DOMINICAN FossiLS—MAURY 147 aperture .50, greatest diameter .75 mm. Locality.—(Exp’d ’16) Bluff 3, Cercado de Mao. Genus TURBONILLA Risso Turbonilla (Chemnitzia) Ogilvtee, n. sp. Plate 25, Figure 11 Shell very slender and delicate, whorls twelve to thirteen in addition to the small helicoid protoconch, volutions nearly flat to slightly rounded, ornamented with heavy, nearly straight ribs, slightly curved near the upper suture, and ending very abruptly at the periphery of the body whorl number of ribs on the last three whorls seventeen each; interspaces smooth and polished; suture distinct, bordered posteriorly by a smooth, narrow band; base of shell smooth; columellar fold inconspicuous. Length 6.5, diam- eter I mm. This little shell belongs to the subgenus Chemmnztzza d’Or- bigny. It is named in honor of Professor Ida H. Ogilvie of Bar- nard College. Gabb’s unfigured 7. augusta appears to have been a Chem- nitzia but is invalid, as Carpenter had used the name nine years before. Locality —(Exp’d’16) Bluff 3, Cercado de Mao. Turbonilla (Chemnitzia) yaqguensis, n. sp. Plate 25, Figure 12 Shell very small and slender, with ten slightly convex whorls ornamented with narrow oblique ribs which extend to the posterior suture and end abruptly at the periphery of the last whorl; interspaces considerably wider than the ribs, smooth and porcellanous; the last three whorls each have about thirteen ribs; suture distinct; columellar fold inconspicuous. Length 3.60, di- ameter .65 mm. This shell is distinguished by its small size, slightly convex whorls, and oblique ribs, much narrower than their interspaces. 148 BULLETIN 29 3i2 Locality.—(Exp'd ’16) Bluff 3, Cercado de Mao. Turbonilla ( Chemnttzta) cercadensts, n. sp. Plate 25, Figure 13 Shell very minute, resembling in form and in the number of whorls Guppy’s 7. plaséica, but his shell is described as having spiral strize and is therefore a Pyrgiscus; whorls six (in addition to the large helicoid nucleus, flattened on the sides and a trifle narrower below than above, giving a turriculate appearance to the whole shell; ribs straight, seemingly ending at the periphery of the last whorl but actually extending feebly beyond it; ribs broad, those ornamenting the last whorl eighteen, and about the same number are on the two whorls preceding the last; inter- spaces between the ribs narrower than the ribs, smooth and pol- ished; base of shell smooth. Length 2.5, diameter .60 mm. Locality.—(Exp’d ’16) Bluff 3, Cercado de Mao; LTurbonilla (Strioturbonilla) dominicensis Gabb Plate 25, Figure 14 Turbonilla Dominicensis Gabb, Trans. Amer. Phil. Soc., vol. 15, p. 225, 1873. Shell small, long and very slender, whorls eleven, very slightly convex, flattened at their centers; suture deep, with the ends of the ribs somewhat projecting, giving the whorls a finely coronate aspect; ribs straight, very slightly oblique, extending only to the periphery of the body whorl or very weakly beyond; number of ribs on the last whorl about sixteen, on the penulti- mate fourteen and fourteen also on the third whorl from the last; spiral sculpture very fine, delicate, and regular between the ribs, coarser and weaker on the base; inner lip showing no fold, col- umella twisted. Length 6, diameter .g mm. Slenderer than 7. ornata d’Orb. and the ribs do not extend over the base as in that shell. Locality,—(Exp’d '16) Bluff 3, Cercado de Mao. Be DOMINICAN Fossirs—MAuRY 149 Turbonilla (Pyrgiscus) Karlschmidti, n. sp. Plate 25, Figure 15 Shell slender, with about eleven post-nuclear whorls, slightly convex, ornamented with weak ribs, twenty-eight on the ulti- mate and twenty-six on the penultimate whorl; ribs wider than the interspaces and extending on the body whorl from the suture to the umbilical region; in the interspaces there are about twenty impressed spiral lines, irregularly spaced and defining unequal bands, on the last whorls these spirals also continue to the um- bilical region; aperture oblong-ovate. Length 8, diameter 1.5 mm. This shell resembles the west coast recent 7. castanea Keep, but the last whorl of the fossil is not inflated. 7. furrz- tissima Guppy from Bowden differs, among other respects, in its sculpture. Locality.—(Exp’d ’16) Bluff 3, Cercado de Mao. Turbonilla (Pyrgiscus) Olssont, n. sp. Plate 25, Figure 16 Shell resembling and related to 7. Karlschmidti, but with fewer ribs and the ribs do not extend completely over the base; nucleus planorboid, post-nuclear whorls thirteen, flattened or slightly convex; ribs about equalling in width the interspaces, ultimate whorl with nineteen, penultimate with eighteen ribs; in the interspaces between the ribs and on the base of the shell are numerous, variable spiral threads, near the middle of each whorl three or four of these spirals are more pronounced; aperture quadrate, columella with a fold. Length 9.5, diameter 2 mm. Locality. —(Exp’d ’16) Bluff 3, Cercado de Mao. Turbonilla (Pyrgiscus) turritissima Guppy Plate 25, Figure 17 Turbonilla turritisstma Guppy, Proc. U. S. Nat. Mus., vol. 19, no. IIIO, p. 316, pl, 28, fig. 5, 1896. 150 BULLETIN 29 © 314 Our shells resemble Guppy’s figure of the Bowden species and appear identical. Locality.—(Exp’d’16) Bluff 3, Cerceado de Mao; Zone H, Rio Cana at Caimito. Turbonilla (Pyrgiscus) riomacénsis, n. sp. Plate 25, Figure 18 Shell extremely siender with thirteen or fourteen whorls ex- clusive of the protoconch which is lost, whorls fattened or slight- ly convex; suture deep, sub-canaliculate; whorls adorned with straight, rather heavy ribs of which there are 16 on the last whorl ending at the periphery; between the sutures in the inter- stices between the ribs there are eleven incised spiral lines which define regular, even, spiral bands; aperture oval; base of body- whorl gently rounded, columella with a low, broad fold. Length 6.5, diameter .g0 mm. Distinguished by its slender form, deep sutures and rather heavy ribs. Locality.—(Exp’d’16) Bluff 3, Cercado de Mao. Turbonilla (Visma) turritelloides Gabb Plate 25, Figure 19 Turbonilia turritelloides Gabb, Trans. Amer. Phil. Soc., vol. 15, p. 226, 1873. Our shells answer well to Gabb’s description of this unfigured species which resembles a miniature 7urrztella. Itisa Visma. Locality.—(Exp’d ’16)—Bluft 3, Cercado de Mao (Abund- ant). Lurbonilla (Mormula) Nanniebelle, n. sp. Plate 25, Figure 20 Shell with twelve to fourteen convex whorls adorned with strong ribs and strong, raised spiral lines in the intervals between the ribs; protoconch small, bulimoid, the last half im- mersed, the apical half projecting laterally and lying at right 315 DOMINICAN FossIrs—MAUvURY LSE angles to the main axis of the shell; ribs strong, straight, slight- ly narrower than their interspaces and ending at the periphery of the last whorl, seventeen on the ultimate and penultimate whorls; the spiral ornamentation consists of incised lines which define broad, ‘flat bands, four to a volution, the three anterior bands being equal, the fourth a little narrower; base of shell smooth or with one or two incised spiral lines near the peri- phery; aperture round; columellar fold inconspicuous. Length 7.25, diameter I mm. Occasionally a specimen shows a broad varix as represented in the species 7. ambusta and T. catalinenszs Dall and Bartsch,— a feature distinguishing Mormula from Pyrgiscus. This dainty shell is named in honor of Miss Nannie Belle Maury of Washington. Locality.—(Exp’d ’16) Bluff 3, Cercado de Mao. Genus Opostom1A Fleming Odostomia Sancti-Dominici, n. sp. Plate 25, Figure 21 Shell minute, polished, entirely smooth, sub-perforate, rather thin; suture distinct; whorls five, their sides nearly straight, ex- cept those of the body whorl which slope convexly to the round- ed base; peritome discontinuous, outer lip thin, slightly pro- duced anteriorly; aperture wide; fold of columella prominent. Length of shell 2.5; of body whorl 1.50; of aperture .90; greatest diameter 1.15 mm. Locality. — (Exp’d’t6) Bluff 3, Cercado de Mao. Odostomia yaqguica, n. sp. Plate 25, Figure 22 Shell minute, with about seven whorls more or less flattened except the last which is slightly convex; suture distinct, some- what channeled by the beveled anterior edge of the volution; base of last whorl rounded; aperture ovate to quadrate; outer lip sim- B52 BULLETIN 29 ies) bt GN ple; the single columellar plication large and sharp. Length of shell 3.50, of body whorl 1.75, of aperture 1; greatest diameter I mm. Locality. (Exp’d ’16) Bluff 3, Cercado de Mao. SUBORDER SCUTIBRANCHIATA A. SUPER-FAMILYV RHIPIDOGLOSSA Genus NERITINA Lamarck Neritina (Puperita) figulopicta, n. sp. Plate 24, Figure Io Shell small, smooth, opaque, white, painted with an open ir- regularly reticulated design embellished with series of parallel dashes, producing the effect of a design on Indian pottery; spire apparently characteristically eroded; aperture semi-lunar; outer lip thin; inner lip with a heavy, expanded, platform-like callus, finely crenulate on its free edge. Greatest diameter of shell 8, greatest thickness 5 mm. This shell is probably the ancestor of WV. pupa Linné living in the West Indies; but differs markedly in the platform-like callus. Localtty.—(Exp’d °’16) Gravels of the Rio Cana near Caimito. Neritina (Smaragdia) viridemaris, n. sp. Plate 24, Figure 11 Neritina viridis Gabb, Trans. Amer. Phil. Soc., vol. 15, p. 242, 1873. Not WV. viridis Linné. Shell small, delicate, color pale sea green painted with par- allel, black lightning-like flashes, straight and zigzag;form some- what oblique; spire depressed; suture distinct; whorls three, the last convex, slightly shouldered; aperture wide, produced an- 317 DoMINICAN Fossiis-—-MaAuRyY 153 teriorly; outer lip thin; inner lip with a thick callus, the free edge of which may be very minutely crenulate. Greatest diameter of shell 8, greatest thickness 3.25 mm. This attractive shell is the precursor of NV. viridis living in the West Indies; but the fossil is smaller and its color scheme very different. We collected over a hundred specimens all with the same design, showingit to be quite constant. Locality. —(Exp’d’16) Bluff 2, (rare); Bluff 3, (abundant), Cercado de Mao. Genus PHASIANELLA Lamarck Phastanella punctata Gabb Plate 24. Figures 12, 13 Lacuna punctata Gabb, Trans. Amer. Phil. Soc., vol. 15, p. 240, 1873. Characterized by microscopic, opaque white spots on a quin- cunx plan upon a semi-translucent ground. The genus Lacuna is chiefly Arcticin its present distribu- tion. The affinities of the fossil seem rather with Phaszanella tessallata (living on the Monte Cristi beach), which is spotted and more or less umbilicated? This would harmonize with Gabb’s remark, ‘‘It is living in the West Indies but I cannot find it de- scribed’’. Localities.—(Exp’d ’16) Bluff 2 (rather rare), Bluff 3 (abundant), Cercado de Mao. Genus Turso Linné Turbo crenulatoides, n. sp. Plate 24, Figure 14 Cf. Turbo castaneus Guppy, Quart. Jour. Geol. Soc., London, vol. 22, p. 291, 18€6; Geol. Mag. London, p. 441, 1874. Cf. Turbo near crenulatus Dall, Trans. Wagner Inst. Sci., vol. 3, pt. 6, p. 1585, 1903. Shell resembling Kiener’s figure of 7Z. crenulatus Gmelin (Kiener, Cog. Viv. vol. 9, pl. 27, fig. 1) but the entire orna- 154 BULLETIN 29 318 mentation is formed of squamose plates, crenate or vaulted. Whorls about six, convex anteriorly, flattened posteriorly, the angle on the shoulder being marked by a conspicuous row of vaulted squames of which there are eighteen on the last whorl. Above and below this the whorls are sculptured with crenate spirals, usually alternating in strength and tending to become nodular on the base. Length of largest specimen 30, width 23 mm. Localities. —(Exp’d ’16) Zone B, Rio Gurabo; Zone H, Rio Cana. Turbo dominicensts variety Laloz, n. var. Plate 24, Figure 15 Shell imperforate with six angulated whorls; on the last are fifteen larger and six smaller revolving, rounded ribs, 21 in all. The most conspicuous is the beaded rib beneath the suture, an- terior to it on the last whorl are three other smaller, beaded spirals and among them two very fine beaded threads, all being on the flattened posterior part of the whorl, the ribs elsewhere are not beaded. Length 23, width 18 mm. This shell differs from Gabb’s description of his unfigured 7: domdnticensis in the angulated whorls and limited number of beaded spirals. Localities —(Exp’d’16) Bluff 2, Cercado de Mao; Zone G, Rio Gurabo at Los Quemados; Zone I, Rio Cana at Caimito. Genus ASTRALIUM Link Astralium sublongispinum, Nn. sp. Plate 24, Figures 16, 17 Astralium longispinum Gabb, Trans. Amer. Phil. Soc., vol. 15, p. 242, 1873. Not Zrochus longispina Lamarck. Shell resembling recent 4. longispbinum but with much finer, more even and oblique sculpture above, and more numerous, finer spirals beneath, the early whorls are not flattened as in the recent shell. The recent species is doubtless the descendant and 319 DOMINICAN Fossits—Maury 155 abounds on the Monte Cristi beach, showing many variations. Locality.—(Exp’d ’16) Bluff 3, Cercado de Mao. (Not rare). Astralium Karlschmidti, n. sp. Plate 24, Figure 18 Shell high, trochiform, imperforate, whorls about five, slight- ly concave, carinated at the periphery which bears about thirteen short, dentate spines. Surface of whorls sculptured with many close-set, very regular, fine, oblique threads, cut by three or four impressed spiral lines near the margins of the whorls. Under surface of shell with very numerous, fine spiral threads crossed by still finer radial stricee. Altitude of largest shell 15, greatest diameter 18 mm. Localities.—(Exp’d ’16)—Bluff 3, Cercado de Mao; Zones H and I, Rio Cana at Caimito. Genus CALLIOSTOMA Swainson Calliostoma Grabaut, n. sp. Plate 24, Figure 19 Shell pyramidal, pearly and iridescent beneath the surface, whorls eight, ornamented with four or five stronger, sharply cre- nate, spiral threads and among them two or three much finer, beaded lines; whoris slightly convex, excavated a little at the suture so that the sides of the shell do not not form an uninter- rupted line from the base to the apex; periphery rounded, base convex, perforate, ornamented with ten narrow, spiral ridges, the wider interstices being strongly sculptured by lines ofgrowth. Altitude 18, diameter 19 mm. This rareand handsome Cadliostomais named in honor of Professor Amadeus Grabau of Columbia University as a token of regard. Localities.—(Exp’d °16) The Samba Hills, about halfway 156 BULLETIN 29 : 320 down the southern slope, on the road from Rompino to Los Cao- bas; also Zone G, Rio Gurabo at Los Quemados. Genus VITRINELLA C. B. Adams Vitvinella (Circulus) striata Gabb Plate 24, Figure 23 Cyclostrema striata Gabb, Trans. Amer. Phil. Soc., vol. 15, p. 242. 1873. Our specimens correspond to Gabb’s description of this unfig- ured species, and appear to be identical. We have referred the species to the section Czrvculus Jeffreys as redefined by Miss Bush. Locality.—(Exp’d’16) Bluff 3, Cercado de Mao. (Common.) Genus TEINostomsA A. Adams Teinostoma sandomingenseé, 0. sp. Plate 24, Figure 24 Shell small, orbicular, flattened, smooth and _ polished, marked only by delicate growth-lines; spire somewhat concealed, periphery convex, very slightly carinate; outer lip sharp; umbilt- cal region covered by a large flat callus; aperture sub-circular; oblique, receding beneath. Diameter 4, altitude 1.54 mm. This species is related to 7. xanum, from the Maryland Miocene and is also akin to the recent 7. cryptospira Verrill. Locality.— (Exp’d ’16) Bluff 3, Cercado de Mao. (Very rare. ) : Genus Discopsis de Folin Discopsis Derby, n. sp. Plate 24, Figure 20 Shell minute, spire depressed, whorls four; upper surface very finely, microscopically, spirally striated,.and marked at in- tervals by faint, curved lines of growth, last whorl flanged by a very strong rounded carina revolving around the shell just be- neath the periphery; base convex, ornamented with eight very 321 DOMINICAN FossiLts—-MAURY 157 strong, sharp-edged, curved, radial plications; aperture oblique, receding below, sagittate, the outer lip being produced into a very conspicuous point; the cord-like umbilical callus is continu- ous with the thickening of the margin of the lip and descends into the umbilicus. This species hasa general resemblance to the Floridian Pliocene 7. calliglyptum Dall and to the recent D. Schumoz Vanatta from the British Honduras. Greatest diameter 4mm. This rare and curiously beautiful shell is named as a tribute to the memory of Dr. Orville A. Derby, lately Director of the Servico Geologico do Brazil, who for over two score years knew of no sacrifice too great to advance the knowledge of the palzeontol- ogy of his adopted land. Locality.—(Exp’d’16) Bluff 3, Cercado de Mao. (A sin- gle shell). Genus FissuRIDEA Swainson fissuridea flenekent, n. sp. Plate 24, Figure 21 Shell resembling /. alfernata Say but differing in the orna- mentation, the concentric laminze being raised into hollow vault- ed scales and tubes as they cross the radiating ribs. An exam- ination of many specimens of /. alternata shows some shells have crenulated scales but none show the hollow tubular structure characteristic of the fossil shell. Asin /. alternata every fourth rib is stronger; the perforation is in front of the middle of the shell, and is keyhole-shaped; the anterior slope is slightly convex, the posterior slope slightly concave. Length 19, breadth 12, al- titude 7 mm. Dedicated to the memory of Colonel Heneken, who made the first collection of fossils and the first sectionsof the Tertiary formations of the Rio Yaqui. Locality.—(Exp’d ’16) Zone H, Rio Cana at Caimito. (A single shell. ) Fissuridea alternata Say Plate 24, Figure 22 Fissurella alternata Say, Jour. Acad. Nat. Sci. Phila., rst ser. vol. 2, 158 BULLETIN 29 322 p. 224. Lucapina alternata Gabb, Trans. Amer. Phil. Soc., vol. 15, p. 244, 1873. Our shells are slightly laterally compressed and narrower, but otherwise appear identical with F. alternata from the Carolina coast. Locality. —(Exp’d’16) Bluff 3, Cercado de Mao (Not common). CEASsS, SCArPAOPrOm, Genus DeNTALIUM Linné Dentalium disstmile Guppy Plate 26, Figure I Dentalium dissimile Guppy, Quart. Jour. Geol. Soc., vol. 22, p. 292, pl. 17, fig. 4, 1866. Cf. Dentalium dissimile Gabb, Trans. Amer. Phil. Soc., vol. 15, p. 244, 1873. Dentalium dissimile Pilsbry and Sharp, Proc. Acad. Nat. Sci. Phila., Vol. /49,.p-.469, pl. 11. figs. 3,4, 15, 1897. Dentalium dissimile Pilsbry, /dem,,vol. 63, p. 136, Tort. Shell with a quadrangular, finely striate apex, becoming smooth, round and shining near the aperture. The type locality is Jamaica. Localities.—(Exp’d’16) Bluffs 2 and 3, Cercado de Mao; Zone G, Rio Gurabo at Los Quemados. Dentalium dissimile variety ponderosum Gabb Plate 26, Figure 2 Dentalium ponderosum Gabb, Trans. Amer. Phil. Soc., vol. 15, p. 244, 1873. Dentalinm dissimile var. ponderosum Pilsbry and Sharp, Proc. Acad Nat. Sci. Phila., vol. 49, p. 470, pl. 10, figs. 1, 2, 3; pl. II. figs. 15 16, 1897. This large, common species often becomes so thickened in- ternally that the cavity becomes a mere perforation. 323 DoMINICAN FossiLts—MAvuRY 159 Localities—(Exp’d’16) Bluff 2, Cercado de Mao (Very abundant); Zone G, Rio Gurabo at Los Quemados. Dentalium Cossmannianum Pilsbry and Sharp Plate 26, Figure 3 Dentalium dissimile variety Gabb, Trans. Amer. Phil. Soc., vol. 15, p. 224, 1873. Dentalium Cossmannianum Pilsbry and Sharp, Proc. Acad. Nat. Sci. Phila., vol. 49, p. 467, pl, 10, fig. 11; pl. 11, figs. 10, 11, 1897. This is differentiated from our other Dominican shells of the genus by its six longitudinal ridges. Collected by Gabb in Santo Domingo (C. U. Museum No. 7630). Dentalium glaucoterrarum, n. sp. Plate 26, Figure 4 Shell with eight equal, distinct, raised longitudinal ribs, in- tervals slightly convex, marked by irregularly spaced circular growth lines; interstitial riblets entirely absent or extremely weak. Length of fragment 23, diameter of larger end 4, of small- er 3 mm. This species resembles D. Cossmannianum, but has eight in- stead of six ribs. Inasmuch as in recent Deztalia the number of ribs is an important character of classification and six and eight ribbed forms are referred to different groups, our fossil would ap- pear to a distinct species. Locality —(Exp’d’16) Zone E, Rio Gurabo at Los Que- mados. Dentalium haytense Gabb Dentalium Haytensis Gabb, Trans. Amer. Phil. Soc., vol. 15, p. 244, 1873. Dentalium haytense Pilsbry and Sharp, Proc. Acad. Nat. Sci., Phila- vol, 49, p. 471, pl. 11, figs. 8, 9, 1897. We have a number of very smooth, shining, tapering Den- talia which seem to be this species. No perfect shell has ever yet been found. Locality,— (Exp’d ’16) Bluff 3, Cercado de Mao. 160 BULLETIN 29 a) S “> Genus Capuus Philippi Cadulus phenax Pilsbry and Sharp Pilate 26, Figure 5 Gadus domingensis Gabb (in part), Trans. Amer. Phil. Soc., vol. 15, P- 245, 1873. Cadulus phenax Pilsbry and Sharp, Proc. Acad. Nat. Sci. Phila., vol. 49, p. 472, pl. 11, figs. 23, 24, 1897. We found hundreds of this delicate little shell in the bluffs of the Mao River. C. dentalinus is the Bowden analogue. Localities.—(Exp’d ’16) Bluff 2 (comparatively scarce), Bluff 3 (very abundant), Cercado de Mao. Cadulus elegantissimus Pilsbry and Sharp Plate 26, Figure 6 Gadus domingensis Gabb (in part), Trans. Amer.. Phil, Soc., vol. 15, Pp, 246, 1873. Cadulus elegantissimus Pilsbry and Sharp, Proc. Acad. Nat. Sci. Phila., vol. 49, p. 473, pl. 11, figs. 28-30, 1897. We collected over fifty shells of this species which resembles C. phenax but is nearly twiceas large. The two occur together in the same bluffs. Localities.—(Exp’d ’16) Bluff 2 (comparatively scarce), Bluff 3, (common), Cercado de Mao; Zone H, Rio Cana at Caimito. Cadulus denticulus-tigris, n. sp. Plate 26, Figure 7 Shell small, polished, smooth, shaped precisely like a minia- ture tiger’s canine tooth; greatest diameter sub-central, thence tapering towards either extremity; apex minute circular; aper- ture somewhat larger, sub-circular. Length of shell 6.25, great- est diameter 1.75 mm. A very rare species, quite different from any fossil Cadulus described from Santo Domingo or Bowden. Locality.—(Exp’d ’16) Zone G, Rio Gurabo at Los Que- mados. 325 - DOMINICAN FossiLs-—MAuURY 161 CLASS te Ewer PODA ORDER PRIONODESMACEA Genus Nucura Lamarck Nucula tenuisculpta Gabb Plate 26, Figure 8 Nucula tenuisculpta Gabb, Trans, Amer. Phil. Soc., vol. 15, p. 255, 1873. Shell oblique, roundly triangular, surface highly polished as though veneered; marked with faint, microscopic radiating lines, inner margin crenulated. Length of largest shell 4, altitude 3 mm. This rather rare species is now figured for the first time. Locality.— (Exp’d 716) Bluff 3, Cercado de Mao. Genus LEDA Schumacher Leda pettella Dall Plate 26, Figure 9 Leda acuta Gabb, Trans. Amer. Phil. Soc., vol. 15, p. 255, 1873. Not L. acuta Conrad 1832, nor Sowerby 1837. Leda peltella Dall, Trans. Wagner Inst. Sci., vol. 3, pt. 4, p. 579, pl. 32, fig. 5; pt. 6, p. 1586, 1903. We collected great numbers of this species, literally thou - sands of shells, in Bluff 3. Our largest specimens attain the length of 8 mm., given by Gabb and Dall, but the great major- ity are about 6mm. Wehave them, however, of all sizes and ages. The anterior and posterior sulcations shown in Dr. Dall’s handsome illustration of the Jamaican shell are sometimes con- spicuous, but often hardly apparent in our shells, yet all seem to be the same species and identical with the Bowden form. Localities, —(Exp’d’16) Bluff 2 (not very common), Bluff 3 (extremely abundant), Cercado de Mao; Zone I (rather scarce), Rio Cana at Caimito; Zone G (rare), Rio Gurabo at Los Quemados. 162 BULLETIN 209 326 Genus Limopsis Sassi Limopsis ovalis Gabb Plate 26, Figure ro “imopsis ovalis Gabb, Trans. Amer. Phil. Soc., vol. 15, p. 255, 1873. Limopsts ovalis Dall, Trans. Wagner Inst. Sci., vol. 3, pt. 4, p. 607, 1898. We collected a single rather worn valve of a Lzmopsts which corresponds to Gabb’s description of his unfigured Dominican species ovalis. Itis somewhat larger than the type and appears to be an aged shell, showing to a marked degree the oblique out- line characteristic of this species on growing older. Greatest length 8.5, altitude 7.5 mm. Guppy’s LZ. subangularis from Trinidad has a much squarer dorsal outline, more prominent beaks, and the ribbing is stronger than the concentric lines. In ovalés the ribbing is much feebler than the concentric lines. Locality —(Exp’d’16) Between Hato Viejo and Potrero, Rio Amina. Limopsis hatoviejonts, n. sp. Plate 26, Figure 11 Shell resembling in form ZL. subangularis from Pointapier, Trinidad, but more elegantly sculptured, and with four strong hinge teeth in both anterior and posterior series with sometimes a weak fifth tooth, while subangularis has only about three in each series. The outline is suborbicular, somewhat oblique; hinge line very straight, not sloping as in ovadis; right and left valves equal but the sculpture slightly discrepant, the radials be- ing stronger on the right valve. Concentric sculpture stronger than indicated in subangularis and consisting of thick, rounded, close- set, cord-like ridges, with much narrower interspaces, the latter almost linear; radials delicate but sharp, thread-like, with much wider interspaces; the radials are waved in crossing over the con- centric cords. The inner margin of the valves is crenulated by 347 DOMINICAN FossiLs—MAuRyY 163 the radials. Ligament pit small, triangular, dividing the teeth into an anterior and posterior series; teeth irregular, the anterior nearly vertical, posterior very oblique. Length 7, altitude ap- proximately 7mm. A rare and exquisite little shell. Locality.—(Exp’d ’16) Between Hato Viejo and Potrero, Rio Amina. Genus Arca Linné Dr. Pearl Sheldon, whose fine Monograph on Atlantic Slope Arcas has lately appeared, has very kindly examined our Santo Domingo Arks, and discriminated most carefully between the species, the majority of which are new. Her expert and inti- mate knowledge of the genus gives to these discriminations a high value. Arca occidentalis Philippi Plate 29, Figure 3 Arca occidentalis Philippi, Abbild. u. Beschr., 3, p. 14, pl. 17b, fig. 4a-c, 1847. Arca noe Guppy, Quart. Jour. Geol. Soc. London, vol. 22, p. 293, 1866. Arca occidentalis Guppy, Zd., vol. 32, p. 531, 1876. Arca occidentalis Sheldon, Palzont.. Amer., vol. 1, p.8, pl. 1, figs. 8-II, 1916. Our fossils from the bluffs seem identical in every respect with recent shells of this species from the Monte Cristi beach. The species has beenreported from Bowden, and is widespread in the Pleistocene and recent Antillean faunas. Localities.—(Exp’d’16) Zone D, Rio Gurabo at Los Que- mados; Zone H, Rio Cana at Caimito. Arca umbonata Lamarck Plate 30, Figure 11 Arca umbonata Lamarck, An. s. Vert., vol. 6, p. 37, 1819. Arca imbricata Gabb (in part), Trans. Amer. Phil. Soc., vol. 15, p. 254, 1873. 154 BULLETIN 29 328 Arca umbonata Sheldon, Paleeont. Amer., vol. 1, p. 8, pl. 1, figs. 12-17, 1916. Our fossil shell is exactly like the recent from the Monte Cristi beach but smaller. The species occurs in the Oligocene of Florida and in the Antillean Pleistocene and recent faunas, but has not been found at Bowden. Locality: -(Expid'16,)\ Zone) HW, Rio Cana at. Cainito, Arca lomasdesaiiba, 1. sp. Plate 30, Figure 12, Shell resembling in general form the young of A. occidentalis, but the ribs are more uniform and more nodulous. The whole plan of sculpture is more elegant. A. occidentalis characteristic- ally has a nearly smooth band (with a group of fine threads) over the umbonal ridge, and another similar band along the pos- terior dorsal margin; between these bands is a pronounced sulcus containing a few normal ribs. The specimen now described shows only very slight development of bands, and the sulcus is much less pronounced. Length of shell 32, altitude 14, thick- ness, of both valves 14 mm. The Chipola analogue is 4. paratina Dall, which is smaller, with much finer ribbing. Locality. —(Exp’d’16) Samba Hills, altitude approximately 540 feet. Arca yaquensis, n. sp. Plate 30, Figure 14 We have about sixteen valves of a minute, true Ark with- out special characters, but apparently not the young of any other species. It is not alate, but is obliquely truncate poster- iorly, and there is no differentiation of the ribs over the rounded, not angular, umbonal ridge. Exteriorly the shell somewhat re- sembles a Scapharca. Perhaps the shell is not quite mature, ~ince the margin is still crenulate. Length 9, altitude 4.75 mm Printed April 9, 1917 329 DOMINICAN Fossi.s—MAURY 165 Localities—(Exp’d’16) Bluffs 2 and 3, Cercado de Mao; Zone I, Rio Cana at Caimito. Subgenus BARBATIA Gray Barbatia of. Bonaczyt Gabb Plate 30, Figure 15 We have a number of valves of a small, thin Barbatia which is either the unfigured B. Bonaczyi Gabb or new. Dall has united Gabb’s species with A. umbonata, a true Ark; but the main point of Gabb’s indefinite description seems to be that this species is nearest &. barbata, but has a more produced and sloping posterior end. Ours is only half as large but may not be adult. Cardinal area as in B. barbaia, ends of the hinge more an- cular; teeth with a short vacant gap between the short anterior and long posterior series; beaks within the anterior fourth; sculpture anterior to the umbonal ridge of fine, beaded, radial rib- lets, anteriorly more widely spaced at intervals, giving the ribs a grouped appearance as in B. barbata,; umbonal ridge more marked than in darbata,; posterior ribs larger, dominating the concentric sculpture which is prominent on the face; a group of fine ribs lies next the hinge; shell produced and pointed along the um- bonal ridge; posterior margin oblique. Length 18, altitude ro, semi-diameter 3 mm. We have a larger valve from the Samba Hills which may be a variation of this species, but it is thicker, the beaks are less anterior, the cardinal area wider, and the teeth are shortest near the middle, growing evenly longer distally, and there is no gap. Locahities.—(Exp’d’16) Zone D, Rio Gurabo at Los Que- mados; Samba Hills at approximately 540 feet altitude. Barbatia (Calloarca) submarylandica, n. sp. We found several fragments of a large Avca of the A. can- dida group, but not that species because the characteristic large 166 BULLETIN 29 230 anterior and posterior ribs are lacking. In the shell described the ribs on the anterior and posterior slopes are no larger than on the rest of the valve. The ribbing is almost identical with that of A. marylandica Conrad, which is typical of the Maryland Miocene, but also occurs in the Oligocene Tampa silex bed. As exceedingly few species are common to the latter horizon and to the blue clays of Santo Domingo an absolute specific identity seems, however, improbable. Localities. —(Exp’d ’16) Guayubin to. Mao road; Zone H, Rio Cana at Caimito. Barbatia (Acar) reticulata Gmelin Plate 30, Figure 16 Arce reticulata Gmelin, Syst. Nat., vol. 6, p. 3311, 1792. Arcr reticulata Sheldon, Paleeontographica Americana, vol. I, p. 20, pl. 4, figs. 8-12, r9Té. This richly sculptured Ark is very rarein the Dominican blue clays, in which it has never before been found. It occurs as a fossil at Bowden, Matura (Trinidad), Tampa silex bed, Chip- ola marls and elsewhere and is now living in the Antilles. Locality.—(Exp'd '16) Bluff 3, Cercado de Mao. (A single valve). Subgenus Norrra Gray SECTION SHELDONELLA, new section Noétia (Sheldonella) maotca, n. sp. Plate 30, Figures 17, 18 Shell small, thin; sculpture as in JV. zzczle or typical /zmula, hinge and cardinal area as in /Voétia; the anterior half of the ligament area with transverse grooves; ligament area extending about half way from the beaks to the posterior end of the hinge; inner margin crenulated; posterior margin with an angle near the hinge asin WV. dzsulcata and typical “mula; shell probably equivalve. The striking feature of this shell is its form. The umbonal ridge is not angular as in the rest of the Voéte, but 23r DoMINICAN Fossi1rs—MAuRY 167 that region is roundly and excessively inflated. The outline is trigonal, the anterior part very small, with beaks at the anterior fifth, posterior part widely spreading. A sinus extends to the well developed notch in the anterior ventral margin. Length 12, altitude beak to base 6, posterior altitude 13.50, semi-diameter 4mm. The general appearance of this shell recalls some of the deep water species like Bathyarca pectunculoides, B. culelrvensis, Cu- cullaria asperula, and C. sagrinata although thereis no gap in the teeth as in many such forms. Because of the variation from typical Voétza, and the possible analogue with deep water forms, it seems best to establish for it the new section Sheldonella to contain thin, small, trigonal Voétias without the angular umbon- al ridge. Locality.—(Hxp’d ’16) Bluff 3, Cercado de Mao (Extreme- ly abundant). Subgenus SCAPHARA Gray Scapharca Flenekeni, n. sp. Plate 29, Figure 2 Arca consobrina Sowerby, Quart. Jour. Geol. Soc. London, vol. 6, p. 52. pl. Io, fig. 12, 1849. Not Arca consobrina d’Orbigny, Pal. Francaise, Terr. Crétacés, vol. 3, p- 209, pl. 311, figs. 4-7, 1844. Arca consobrina Guppy, Quart. Jour. Geol. Soc. London, vol. 32, p. 531, 1876. Arca consobrina Dall, Trans. Wagner Inst. Sci., vol. 3, pt. 4, p, 646, 1898. ( Arca consobrina Sheldon, Paleont, Amer., vol. 1, p. 49, 1916. As Dr. Dall and others have pointed out, Sowerby’s name is preoccupied. The writer would suggest as a new name ene- kent, in honor of Colonel Heneken by whom the type was col- lected. This Scapharca belongs to a group comprising many species of which hypomela, lienosa, secticostata, and halidonata are well- known members. The principal feature of the species is its grooved and beaded ribs, numbering thirty-five or thirty-six; the 168 BULLETIN 29 332 anterior ribs show a deep medial groove extending well up towards the beaks, and on each side of this a shallower groove; the cen- tral ribs just anterior to the umbonal ridge have several longi- tudinal grooves; the ribs of the posterior slope beginning near the angle of the umbonal ridge are flatter, nearly smooth, and little sulcate. The ribs are wider than the interspaces and crossed by concentric raised lines which produce a beaded appear- ance especially near the center of the shell. Compared with other West Indian species of the same group it is distinguished by its oblong form, base nearly parallel to the hinge, and less produced umbonal ridge. Length 50, altitude 29, thickness of one valve 15 mm. fide Dall, Guppy’s A. consobrina from Jamaica is halidonata Dall, which is shorter and higher, with a more arcuate base. Localities.—(Exp’d’16) Bluff 2, Cercado de Mao; Zone B, Rio Gurabo at Los Quemados. Valves probably young of this species were found in Bluff 3, Cereado de Mao and on the Samba Hills at approximately 540 feet altitude. Scapharca golfoyaquensis, n. sp. Plate 28, Figure 5 This is another member of the group to which A. Henekent belongs. The ribs number thirty-eight and the ribbing is nearly the same, but the central ribs appear to be narrower and less divided. The central ribs of the left valve are conspicuously beaded while those of the right valve are smoother, flatter and more square, whether the latter character is true of Wenekent we do not know as all our valves are left. The chief difference be- tween 4. Henekent and golfoyaquensts lies in the form, the latter species being conspicuously and constantly much more produced and pointed posteriorly, the beaks are fuller and more anterior. Instead of being oblong the shell is broad posteriorly and narrow anteriorly ; cardinal area long and moderately wide, with a few concentric grooves; hinge line long with numerous vertical teeth somewhat oblique at the posterior end of the series. Length 59, altitude 31, thickness of one valve 16 mm. 233 DoMINICAN FossiILs—MAURY 169 Localities —(Exp’d’16) Zones B, F, G, Rio Gurabo at Los Quemados; Zone H, Rio Cana at Caimito; Bluff 1, Cercado de Mao. Scapharca cercadica, n. sp. Plate 29, Figure 5 Sheil thin and fragile for the group; elegantly and finely sculptured; anterior margin rounded, apparently meeting the hinge at an angle but both ends of the hinge are broken in our single specimen; basal margin nearly straight and parallel to the hinge; posterior margin oblique, not straight but slightly sinuous above, as shown by the growth-lines, and broadly, evenly and gracefully curving into the ventral margin; ribs thirty-four, wider than the interspaces, those anterior to the umbonal ridge very evenly, dichotomously divided for nearly their entire length by a sulcus two-thirds as wide as the interspaces; there are no second- ary grooves except faint traces on the umbonal ridge; posterior ribs smoother and flatter, with a less pronounced incised line; ribs and interspaces crossed by fine, even, close-set, concentric lines; hinge long and narrow, central portion broken. away, distal teeth delicate and short, anterior vertical, posterior no larger than the anterior, barely inclined. Length 50, altitude approxi- mately 25 mim. This rare and elegant Scapharca cannot be confused with any of our other Dominican species. Locality.—Exp’d ’16) Bluff 1, Cercado de Mao. Scapharca Margarete, n. sp. Plate 28, Figure 1 Shell large, oblong, solid, ribs thirty-one, entire, narrower than the concave interspaces and flat-topped or slightly rounded; ribs and interspaces crossed by fine, even, concentric threads forming arches over the ribs and loops in the interspaces; the ribbing is very similar to that of Anadara aresta and A. campsa, from the Florida Miocene; some of the ribs distally show a mere trace of a mesial groove; hinge line long with numerous teeth nearly vertical except at the posterior end where they are some- 170 BULLETIN 29 334 what longer, slightly inclined and somewhat broken up; cardinal area wide for the group, with about five concentric, somewhat ir- regular grooves. Length 81, altitude 50, thickness of both valves 49 mm. This species is superficially somewhat like A. secticostata Reeve, but the ribs in that species are deeply grooved. Locality. —(Exp’d ’16) Rio Cana, Guayubin to Mao road. Scapharca guayubinica, n. sp. Plate 28, Figure 4; Plate 29, Figure 1 Shell ventricose, ribs twenty-nine; beaks mesially impressed; cardinal area moderately wide with about four concentric grooves, part of which do not extend ahead of a V-shaped groove connect- ‘ing the beaks, with the point turned backwards; hinge line long with numerous teeth forming two series, the anterior vertical, the posterior series about one and a half times as long, gradually increasing in length posteriorly, the posterior teeth somewhat in- clined. Length 45, altitude 31, diameter 29 mm. This specles is very similar to A. Margarete excepting that the hinge is comparatively wider and the shell only half as large. Specimens in our Gabb collection appear to be mature and a valve of ours from Rio Cana, 53 mm. in length, has every ap- pearance of an aged shell, while 4. Margarete though twice as large does not appear senile. Locality.—(Exp’d’16) Rio Cana, Guayubin to Mao road. Scapharca viogurabonica, n. sp. ’ Plate 29, Figure 4 We collected a number of similar valves identical with one in the Gabb collection, which like the preceding was in Gabb’s box of ‘‘Arca consobrina’’. This species is smaller than 4. guayubinica and more produced along the umbonal ridge, with a more marked angle between the posterior and ventral margins; it is less inflated anteriorly. In A. guayubinica the anterior and _ basal margins are distinct and meet in a broad curve, while in the species now described the two tend to form a point near the 335 DOMINICAN Fosst_ts—MAvuRY 171 hinge to the posterior angle. The sculpture of this species is more elegant, the undivided ribs, which number twenty-eight, have more of a tendency to be rounded at the top; in two valves which belong together the ribs of the left valve arerounded on the center of the shell, while on the right valve they are square- topped and less ornamented; this difference tends to occur also in A, Margarete and guayubinica, but is more marked in vzogura- bonica. Length ao, altitude 25, diameter 26 mm. A complete series may prove this amutation of 4. guayu- bintca characteristic of the Rio Gurabo. Locality.—(Exp’d ’16) Zones A and B, Rio Gurabo at Los Quemados. Scapharca ineguilateralis, Guppy Plate 30, Figure 8 Arca inequilateralis Guppy, Quart. Jour. Geol. Soc., London, vol. 32, p. 293, pl. 18, fig. 2, 1866. Scapharca (Scapharca) inequilateralts Dall, Trans. Wagner Inst. Sci., vol. 3, pt. 4, p. 647, 1898. Arca ineqguilateralis Sheldon, Paleeont, Amer., vol. I, p. 50, 1917. A comparison of our specimens from the Guayubin to Mao road, Rio Cana, with A. /atidentata Dall from the Chipolan beds, Florida, shows that Dr. Dall’s remarks are very fitting. Pilearere sees Sinum chipolanum........ Aare pennelli, 55, 8... 59 Sinum excentricum........... 202 oS gatunense; FO, 2.....- 302 HS MOMENI, GO); Tcococdpees 303 HR PELSPECtiviuitaal sees: 302 Solariella shacklefordensis (OE TPM OSs oe aurea 47 Solarium gatunense ........... 205 «ec granulatum, 49, 3 295 pretfemorale, 73, ve Eck face te nace Sone 270 ne quadriseriatum, 49, Ie ei seneneon ain aeaeeee eee 295 se stonemane, 49, 4, ys ea EN tie Seine 296 SoOlemmMopliqMmmsierssseeseeeeeee: 394 Spisula harrisi Ols., 8, 5, 6.. 52 Sen Suibponderosam eee: 161 Sponcylus americanus..... .. 355 He bostrychites, 58, U Mesa are tea aarn et 254 A ~gumanomocon... 355 Sits MRNAS SUSIE. oo cscn0: sterneee 155 Stratigraphy of Santo Do- MUI S ONp a Ee oaamaeeetcer 453 Strigilla caimitica, 65, 7...... 389 ‘““ pisiformis, 65, 6..... 389 Strombina bassi, 77, 17..... 260 i caribeea, 7/, 6.... 262 x cyphonotus, 77, F[ppeios Boone eanaaseScOeCUEE 261 divilitus, 47, 12.. 262 ss @xaliSteee cn seeoseeen 262-263 es Sal aaa eeere 261 ue gradatayas.scgeiks 261 es haitensis, 47, 18 258-259 3 lessepsiana ........ 261 nanniebelle, zr, Ty i TO te a sa me 260 “ nuestrasenore, 41 sliahieactetsterers aiatielsis etsy 262 y [OPAIGIOME, 5 cecocoe bees 261 5 pseudohaitensis, Hy MD WB yn 250 ve se var gura- 60 IDES, Wis WAL pcccdca0 Strombinella acuformis, 77, e Toss nc cece cece cece reccecerens Strombus pions: Ho Dy B eS bituberculatus ... et AMUUUES ooocosoosnedou aS haitensis, 76, I... vg maoeénsis, 47, I uo proximus, 6, 4 iF iaaiciseites wueae ununssteee a FODYEFUSIS ontingoacccoce oe pugiloides, 46, 6 Strongylocera guppyl......... Surcula jaqueusis, 34, I COeel al iatanyec 7am tener: ‘ riomaonis, 74, 3..-.-- MUESTOSAOSSE, coccecooponvosacnss0 Tectibranctuata ...........000++ Teinostoma cryptospira...... 2: MEVTNEVIR a5 scooeaee a miocenica Ols.. ZOTAR MG i jeNnstncntiees a sandomingense FD, Dibkssones ansasones 0600 eS thompsoni Ols., Oy Bp Alocooopapovosanacc oe variabilis Ols., Neate Wagers kaa Sane Teleodesmacea ...............65. Tellidora crystallina........... Tellina cercadica, 64, 9...... “ cibaoica, (Zh, NO ecacse ‘« crystallina, 64, 4.... -‘ islahispaniolee, 64, 6 GO saoeOrieel, OAL, GF sonbocooc GU > SaobPENEN Eo poascocodosoHooor SG OSWIC TI AADIS poanooneossens SC jorxonlermnts SUG Ji) Sec “ riocanensis, 64, Bee ‘« sancti-dominici, 64. GG ean” Ml, WAsccosccce ‘“ subtriangularis Ald. ‘« temperata Ald., 7. 6 476 Tellina waylanduaughani, 64, is ose sodddeanto asin : 386° Terebra amitra, 29, 21........ 192 : berlinere, 30, 7, 8 168 an pipanbitaseeeeee 188, 189, 190 i SE SUNBON RA ss 187 pe cambiarsoi, 29, 29 I9l ch CGHAWS, Ay W7arecccoe 189 i dislocatamereacee sas 188-192 se gatunensis, 30, 5... 195 oe gausapata var. leevi- fasciola, 26, 19...... ‘QI os haitensis, 70, 3...... 194 “ ineequalis, 30, 2..... 193 He Oligomiiltraleeeee eee 189 a s 2Q), Soe 190 me {OSUUGL, FO, Accoccaassoo 195 a [DROW GOs Woessoe 192 eS OVW OUSLAL sacnaavansocoee 186 Ui spirifera, 29, o 16. 188, 190 0 SHICHI, BO, Toscoc 156 a wolfgangi, 30, a 197 tesvedls incrassata, 65, 24.. 399 oo SAEs tll Gis see eeneeme ee ae 399 Thais clarkensis Ald., 3, 2.. 7 Tornatina coix-lacryma...... 178 BU canaliemlatayenee: 177 a ovum-lacerti...... 179 a NECtaNuNm EE s 178 Moxo glossaleeieewas ieee mennen 186 Trichotocrinus, n. sub-gen.. 27 Triforis calypsonis, 47, 13.. 286 eid aldptOssilspeeses = eeee eee 423 Triphoris bartschi Ols., 26, 1 rer Reece TAS ana aE 137 a dupliniana Ols., BOS Gravis tore seas cian 138 Tritia golfoyaqueusis, 41, 24 256 Anion ELAN ORANLIS,, ococsooesobor 270 af gracihis. 2 tee seee 271 is Pileane are se= eeeeeeeees 269 a simillimus ............ 271 [ritonium lineatum........... 269 Trivia globosa, 45, 13......... 281 477 Trivia islahispaniola, 45, 14 ‘« suffusa var. sancti- domiinici, 45, I5........ Trochus conchyliophora..... Turbonilla ovoides ............ a scolymus........... VUNG INS cocseconsose lOWUKETGS Ec goscconee slincbokeastanetsu asses eee ‘. _ erenulatoides, 50, 14 ‘« dominicensis var. ws LENG GO, W5scccossnnacoss Turbonilla agrestis Ald., 4, Drie SOARS sa ohne oe augusta ............ bt catalineata......... ss cercadensis, 57, Tes Sense ce geccmnste ase BY dominicensis, 57, V/s laces GEEG ACES ECM ROES a karlschmidti, 57, NGS B ESE SAAS CERNE ae Nee as mitchelliana Ald 9) Booseavponc0scsc002 codes 3 nanniebelle, 51, PAO Pen GO OE Meee: ogilvieze, 51, Il. aie olssoii, 51, 16.... ag riomao€nsis, 51, MO neeeeisa ee etecadene sean ve turritissima, 57, TPA aca Chins CuaceeneZ ee rs turritelloides, 57, LO). he ieetecte eenasacess ia} yaquensis, 57, 12 Turricula bullennewtoni, Feky ©5 @scncoososeccenccve; Turris albida 34, 4-8......... : COVMMTTIDIONS), ooossoonesenne Uerehenekeni. 5.0 ee AND. ‘ ATA NtanstSheeeeey eee eee “0 SOPRENINC Sn ocnceeratecasee oe VETS Gali cease antes Turritella bipertita............ Turritella indenta ........... oo mimetes :.......... s planigyrata, 48, TA i ee acer eeeetita ne ss plebeiasa ee a submortoni, 48, DG reece ace sse eens “f tornata, 48, 15... by plisealatuse-sssasc-aceeuteese cercadicus, 42, 12... harrisi Ols., 9, 7, 9 Vasum dominicense var. gurabicum, 39, 7...... CH POMA CHIN ees -peee==s Os haitense, 39, 6........ Vaughan on Santo Domingo “é sé COTA Seen nae eee 166, SOs 3h secesens saaceea le soan a scituloides Ols., ONES SHUTVCE) Sen acnconsooes is OrbiculardSmeye sear i Pap liapaeemcece ser of papulosus.......... sculpturatus....... Vitrinella striata, 50, 23...... Nolutaypmleheliapere-ssesssees ied 44 Volvula cylindrica, 29, 5.... ee ObGyn cnconsogpeccascen Whitney, F. L., Echinoidea of Buda 1’s, Bull. 26, ig Oe Neda, Lie an ee gees Xancus preovoides, 4o, 18 61 62 i validtis), 705) 5peeee-c 247 Xenophora conchyliophora, YQ 7 hs BEEN rae. 207 delecta, 79, 8, 9.. 298 478 imperforata....... 298 Wa CHULA, Sete ate ates ee creer 174 -Yorktown formation.......... 61 cE SUBVEE Soeancednaccosss 155 END OF VOLUME V. ‘Un sere ee s SSS = s> Se ee = Sesser reeesesee Sotoise 2 seers eatzesessaes. 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